diff --git a/src/amd/compiler/aco_ir.h b/src/amd/compiler/aco_ir.h
index 9dda1ffb723..1d6220ef928 100644
--- a/src/amd/compiler/aco_ir.h
+++ b/src/amd/compiler/aco_ir.h
@@ -174,7 +174,7 @@ struct memory_sync_info {
       return (!storage || (semantics & semantic_can_reorder)) && !(semantics & semantic_volatile);
    }
 };
-static_assert(sizeof(memory_sync_info) == 3);
+static_assert(sizeof(memory_sync_info) == 3, "Unexpected padding");
 
 enum fp_round {
    fp_round_ne = 0,