diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 0539956..69ad455 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -37,7 +37,7 @@ jobs:
         run: make check
 
       - name: Upload test log
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: testsuite.log
           path: tests/testsuite.log
diff --git a/tests/dump_core.c b/tests/dump_core.c
index 82314e1..001de57 100644
--- a/tests/dump_core.c
+++ b/tests/dump_core.c
@@ -15,7 +15,7 @@
 
 static char const *prefix = "/tmp/satyr.core";
 
-#if __clang__
+#if defined(__clang__)
 __attribute__((optnone))  
 #else
 __attribute__((optimize((0))))