diff --git a/configure.ac b/configure.ac
index 64e2c04f9..192c012ac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -90,7 +90,8 @@ fi
 dnl Checks for typedefs, structures and compiler characteristics
 
 AX_CHECK_COMPILE_FLAG([-Werror=implicit], [CFLAGS="$CFLAGS -Werror=implicit"])
-AX_CHECK_COMPILE_FLAG([-Werror=maybe-uninitialized], [CFLAGS="$CFLAGS -Werror=maybe-uninitialized"])
+AX_CHECK_COMPILE_FLAG([-Werror=maybe-uninitialized], [CFLAGS="$CFLAGS -Werror=maybe-uninitialized"],,[-Werror])
+AX_CHECK_COMPILE_FLAG([-Werror=sometimes-uninitialized], [CFLAGS="$CFLAGS -Werror=sometimes-uninitialized"],,[-Werror])
 AX_CHECK_COMPILE_FLAG([-Werror=memset-transposed-args], [CFLAGS="$CFLAGS -Werror=memset-transposed-args"])
 AX_CHECK_COMPILE_FLAG([-Wnull-dereference], [CFLAGS="$CFLAGS -Wnull-dereference"])
 AX_CHECK_COMPILE_FLAG([-Werror=sizeof-array-argument], [CFLAGS="$CFLAGS -Werror=sizeof-array-argument"])