diff --git a/src/common/attrib.h b/src/common/attrib.h
index a16b94a3b..3cdacb9d5 100644
--- a/src/common/attrib.h
+++ b/src/common/attrib.h
@@ -46,7 +46,7 @@
 
 #ifdef __clang__
 #  define attribute(a)      __attribute__(a)
-#  define ATTR_UNUSED(x)    x
+#  define ATTR_UNUSED(x)    __attribute__((__unused__)) x
 #  define ATTR_NORETURN     __attribute__((analyzer_noreturn))
 #elif defined(__GNUC__)
 #  define attribute(a)      __attribute__(a)