--- a/admin/acinclude.m4.in
+++ b/admin/acinclude.m4.in
@@ -2144,9 +2144,6 @@
 save_CXXFLAGS="$CXXFLAGS"
 kde_safe_LIBS="$LIBS"
 LIBS="$LIBS $X_EXTRA_LIBS"
-if test "$GXX" = "yes"; then
-CXXFLAGS="$CXXFLAGS -pedantic-errors"
-fi
 AC_TRY_COMPILE([
 $2
 ],
