diff --git a/src/gallium/auxiliary/gallivm/lp_bld_intr.c b/src/gallium/auxiliary/gallivm/lp_bld_intr.c
index e153389e6a9..f806503038d 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_intr.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_intr.c
@@ -84,7 +84,7 @@ lp_format_intrinsic(char *name,
       width = 64;
       break;
    default:
-      assert(0);
+      unreachable("unexpected LLVMTypeKind");
    }
 
    if (length) {