diff --git a/lib/Data/Time/Calendar/CalendarDiffDays.hs b/lib/Data/Time/Calendar/CalendarDiffDays.hs
index 938f5675172820a807a6357f0638f93bd9cf3da5..d5c69b8901af6bd23be35004eb1db7b811c1b8ca 100644
--- a/lib/Data/Time/Calendar/CalendarDiffDays.hs
+++ b/lib/Data/Time/Calendar/CalendarDiffDays.hs
@@ -19,11 +19,11 @@ data CalendarDiffDays = CalendarDiffDays
     , cdDays :: Integer
     } deriving (Eq,
     Data
-#if __GLASGOW_HASKELL__ >= 820
+#if __GLASGOW_HASKELL__ >= 802
     -- ^ @since 1.9.2
 #endif
     ,Typeable
-#if __GLASGOW_HASKELL__ >= 820
+#if __GLASGOW_HASKELL__ >= 802
     -- ^ @since 1.9.2
 #endif
     )
diff --git a/lib/Data/Time/LocalTime/Internal/CalendarDiffTime.hs b/lib/Data/Time/LocalTime/Internal/CalendarDiffTime.hs
index fa07d33344c8bfb6b7b48a954f426f51e89d0b36..7897e59c141e954d969b116435a89f8fa028d877 100644
--- a/lib/Data/Time/LocalTime/Internal/CalendarDiffTime.hs
+++ b/lib/Data/Time/LocalTime/Internal/CalendarDiffTime.hs
@@ -21,11 +21,11 @@ data CalendarDiffTime = CalendarDiffTime
     , ctTime :: NominalDiffTime
     } deriving (Eq,
     Data
-#if __GLASGOW_HASKELL__ >= 820
+#if __GLASGOW_HASKELL__ >= 802
     -- ^ @since 1.9.2
 #endif
     ,Typeable
-#if __GLASGOW_HASKELL__ >= 820
+#if __GLASGOW_HASKELL__ >= 802
     -- ^ @since 1.9.2
 #endif
     )