diff --git a/System/Posix/Process.hsc b/System/Posix/Process.hsc
index 992fd9a3ce39ad03344f8eb1128c11fbd4e63537..2acb57ee894aef9b862503f5017c1b16be111491 100644
--- a/System/Posix/Process.hsc
+++ b/System/Posix/Process.hsc
@@ -22,6 +22,7 @@ module System.Posix.Process (
     -- ** Forking and executing
 #ifdef __GLASGOW_HASKELL__
     forkProcess,
+    forkProcessWithUnmask,
 #endif
     executeFile,