diff --git a/compiler/GHC/Driver/Errors/Ppr.hs b/compiler/GHC/Driver/Errors/Ppr.hs
index 1fa3f5bad7138960add24e594d258d21a36cc1d4..f2e8fac6f4b8c1a64682bf80d99f190b29b07a98 100644
--- a/compiler/GHC/Driver/Errors/Ppr.hs
+++ b/compiler/GHC/Driver/Errors/Ppr.hs
@@ -294,7 +294,7 @@ instance Diagnostic DriverMessage where
       -> ErrorWithoutFlag
     DriverInterfaceError reason -> diagnosticReason reason
     DriverInconsistentDynFlags {}
-      -> WarningWithoutFlag
+      -> WarningWithFlag Opt_WarnInconsistentFlags
     DriverSafeHaskellIgnoredExtension {}
       -> WarningWithoutFlag
     DriverPackageTrustIgnored {}
diff --git a/compiler/GHC/Driver/Flags.hs b/compiler/GHC/Driver/Flags.hs
index 8a00f0b0cc5bf99a9ff89aefbd3303e54fb470e8..d9a335f8c36a6559ec2d4d6d48ae6aee00238107 100644
--- a/compiler/GHC/Driver/Flags.hs
+++ b/compiler/GHC/Driver/Flags.hs
@@ -650,6 +650,7 @@ data WarningFlag =
    | Opt_WarnMissingRoleAnnotations                  -- Since 9.8
    | Opt_WarnImplicitRhsQuantification               -- Since 9.8
    | Opt_WarnIncompleteExportWarnings                -- Since 9.8
+   | Opt_WarnInconsistentFlags                       -- Since 9.8
    deriving (Eq, Ord, Show, Enum)
 
 -- | Return the names of a WarningFlag
@@ -760,6 +761,7 @@ warnFlagNames wflag = case wflag of
   Opt_WarnMissingRoleAnnotations                  -> "missing-role-annotations" :| []
   Opt_WarnImplicitRhsQuantification               -> "implicit-rhs-quantification" :| []
   Opt_WarnIncompleteExportWarnings                -> "incomplete-export-warnings" :| []
+  Opt_WarnInconsistentFlags                       -> "inconsistent-flags" :| []
 
 -- -----------------------------------------------------------------------------
 -- Standard sets of warning options
@@ -898,7 +900,8 @@ standardWarnings -- see Note [Documenting warning flags]
         Opt_WarnUnicodeBidirectionalFormatCharacters,
         Opt_WarnGADTMonoLocalBinds,
         Opt_WarnLoopySuperclassSolve,
-        Opt_WarnTypeEqualityRequiresOperators
+        Opt_WarnTypeEqualityRequiresOperators,
+        Opt_WarnInconsistentFlags
       ]
 
 -- | Things you get with -W
diff --git a/docs/users_guide/9.8.1-notes.rst b/docs/users_guide/9.8.1-notes.rst
index dab80a070d41baf0fcf87d27d923ab82732ea086..2f1025260bff3d7af6fa2d67802e3d57a0b83b1c 100644
--- a/docs/users_guide/9.8.1-notes.rst
+++ b/docs/users_guide/9.8.1-notes.rst
@@ -208,6 +208,10 @@ Compiler
   by default for now whilst we consider more carefully an appropiate fix.
   (See :ghc-ticket:`23469`, :ghc-ticket:`23109`, :ghc-ticket:`21229`, :ghc-ticket:`23445`)
 
+- The warning about incompatible command line flags can now be controlled with the
+  :ghc-flag:`-Winconsistent-flags`. In particular this allows you to silence a warning
+  when using optimisation flags with :ghc-flag:`--interactive` mode.
+
 GHCi
 ~~~~
 
diff --git a/docs/users_guide/using-warnings.rst b/docs/users_guide/using-warnings.rst
index 37ae36ae50a551b4cad78d17fefeb26763228e34..bcf1068bcbe4b23c8bcb24a79cfb56e4c79df53c 100644
--- a/docs/users_guide/using-warnings.rst
+++ b/docs/users_guide/using-warnings.rst
@@ -78,6 +78,7 @@ as ``-Wno-...`` for every individual warning in the group.
         * :ghc-flag:`-Wforall-identifier`
         * :ghc-flag:`-Wgadt-mono-local-binds`
         * :ghc-flag:`-Wtype-equality-requires-operators`
+        * :ghc-flag:`-Winconsistent-flags`
 
 .. ghc-flag:: -W
     :shortdesc: enable normal warnings
@@ -2426,7 +2427,7 @@ of ``-W(no-)*``.
     :reverse: -Wno-role-annotations-signatures
     :category:
 
-    :since: 9.8
+    :since: 9.8.1
     :default: off
 
     .. index::
@@ -2448,7 +2449,7 @@ of ``-W(no-)*``.
     :reverse: -Wno-implicit-rhs-quantification
     :category:
 
-    :since: 9.8
+    :since: 9.8.1
     :default: off
 
     In accordance with `GHC Proposal #425
@@ -2465,9 +2466,6 @@ of ``-W(no-)*``.
 
     This warning detects code that will be affected by this breaking change.
 
-If you're feeling really paranoid, the :ghc-flag:`-dcore-lint` option is a good choice.
-It turns on heavyweight intra-pass sanity-checking within GHC. (It checks GHC's
-sanity, not yours.)
 
 .. ghc-flag:: -Wincomplete-export-warnings
     :shortdesc: warn when some but not all of exports for a name are warned about
@@ -2496,5 +2494,23 @@ sanity, not yours.)
           )
         import A
 
-     When :ghc-flag:`-Wincomplete-export-warnings` is enabled, GHC warns about exports 
-     that are not deprecating a name that is deprecated with another export in that module.
\ No newline at end of file
+     When :ghc-flag:`-Wincomplete-export-warnings` is enabled, GHC warns about exports
+     that are not deprecating a name that is deprecated with another export in that module.
+
+.. ghc-flag:: -Winconsistent-flags
+    :shortdesc: warn when command line options are inconsistent in some way.
+    :type: dynamic
+    :reverse: -Wno-inconsistent-flags
+
+    :since: 9.8.1
+    :default: on
+
+    Warn when command line options are inconsistent in some way.
+
+    For example, when using GHCi, optimisation flags are ignored and a warning is
+    issued. Another example is :ghc-flag:`-dynamic` is ignored when :ghc-flag:`-dynamic-too`
+    is passed.
+
+If you're feeling really paranoid, the :ghc-flag:`-dcore-lint` option is a good choice.
+It turns on heavyweight intra-pass sanity-checking within GHC. (It checks GHC's
+sanity, not yours.)
diff --git a/testsuite/tests/driver/T20436/T20436.stderr b/testsuite/tests/driver/T20436/T20436.stderr
index 66b0af04c641890611f8de5d6405971759126671..85ac12692dbc41fe8ea00738e169a9be3e5e7463 100644
--- a/testsuite/tests/driver/T20436/T20436.stderr
+++ b/testsuite/tests/driver/T20436/T20436.stderr
@@ -1,3 +1,3 @@
 
-when making flags consistent: warning: [GHC-74335]
+when making flags consistent: warning: [GHC-74335] [-Winconsistent-flags (in -Wdefault)]
     -dynamic-too is ignored when using -dynamic
diff --git a/testsuite/tests/ghc-api/T10052/T10052.stderr b/testsuite/tests/ghc-api/T10052/T10052.stderr
index 15864131c5cbf2d0380f974d6aa6ad7b8730af41..25e477d991292a1edb6ffa29c595daf20f1eee39 100644
--- a/testsuite/tests/ghc-api/T10052/T10052.stderr
+++ b/testsuite/tests/ghc-api/T10052/T10052.stderr
@@ -1,3 +1,3 @@
 
-when making flags consistent: warning: [GHC-74335]
+when making flags consistent: warning: [GHC-74335] [-Winconsistent-flags]
     Ignoring optimization flags since they are experimental for the byte-code interpreter. Pass -fno-unoptimized-core-for-interpreter to enable this feature.
diff --git a/testsuite/tests/ghci/should_fail/T10549.stderr b/testsuite/tests/ghci/should_fail/T10549.stderr
index 8ce1e6cadf74523ec561f34448ef3f52090295bd..69f80c898042401b7f9a3c137f8968311937a0d9 100644
--- a/testsuite/tests/ghci/should_fail/T10549.stderr
+++ b/testsuite/tests/ghci/should_fail/T10549.stderr
@@ -1,2 +1,3 @@
-when making flags consistent: warning: [GHC-74335]
+
+when making flags consistent: warning: [GHC-74335] [-Winconsistent-flags (in -Wdefault)]
     Ignoring optimization flags since they are experimental for the byte-code interpreter. Pass -fno-unoptimized-core-for-interpreter to enable this feature.
diff --git a/testsuite/tests/th/T8333.stderr b/testsuite/tests/th/T8333.stderr
index 15864131c5cbf2d0380f974d6aa6ad7b8730af41..69f80c898042401b7f9a3c137f8968311937a0d9 100644
--- a/testsuite/tests/th/T8333.stderr
+++ b/testsuite/tests/th/T8333.stderr
@@ -1,3 +1,3 @@
 
-when making flags consistent: warning: [GHC-74335]
+when making flags consistent: warning: [GHC-74335] [-Winconsistent-flags (in -Wdefault)]
     Ignoring optimization flags since they are experimental for the byte-code interpreter. Pass -fno-unoptimized-core-for-interpreter to enable this feature.