diff --git a/configure b/configure
index 209198cb7e..b5231f48a2 100755
--- a/configure
+++ b/configure
@@ -32915,7 +32915,7 @@ else
         fi
     else
         if test "$GCC" = yes ; then
-                                                OPTIMISE_CFLAGS="-O2 -fno-strict-aliasing"
+            OPTIMISE_CFLAGS="-O2"
         else
             OPTIMISE_CFLAGS="-O"
         fi
diff --git a/configure.in b/configure.in
index 8b5a31eebe..70df888ae0 100644
--- a/configure.in
+++ b/configure.in
@@ -5101,10 +5101,7 @@ else
         fi
     else
         if test "$GCC" = yes ; then
-            dnl Switch on optimisation but keep strict-aliasing off for
-            dnl now (see -fstrict-aliasing in the gcc manual). When it is
-            dnl switched back on consider using -Wstrict-aliasing=2.
-            OPTIMISE_CFLAGS="-O2 -fno-strict-aliasing"
+            OPTIMISE_CFLAGS="-O2"
         else
             OPTIMISE_CFLAGS="-O"
         fi