diff --git a/core/include/assert.h b/core/include/assert.h
index 21ed84ab14..b4ce8f0754 100644
--- a/core/include/assert.h
+++ b/core/include/assert.h
@@ -119,7 +119,7 @@ NORETURN void _assert_failure(const char *file, unsigned line);
  * Generates a division by zero compile error when cond is false
  */
 #define static_assert(cond, ...) \
-    enum { static_assert_failed_on_div_by_0 = 1 / (!!(cond)) }
+    { enum { static_assert_failed_on_div_by_0 = 1 / (!!(cond)) }; }
 #endif
 #endif