diff --git a/configure.ac b/configure.ac
index 35617c4f..6cd9d9b7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -65,6 +65,7 @@ AS_IF([test "x${GCC}" = "xyes"],
       VKD3D_CHECK_CFLAGS([-Wunused-but-set-parameter])
       VKD3D_CHECK_CFLAGS([-Wvla])
       VKD3D_CHECK_CFLAGS([-Wpointer-arith])
+      VKD3D_CHECK_CFLAGS([-Wenum-conversion])
       VKD3D_CHECK_CFLAGS([-Wl,--no-undefined])])
 
 dnl Check for cross compilers