diff --git a/make/checks.am b/make/checks.am
index 2a42c1b..9b49268 100644
--- a/make/checks.am
+++ b/make/checks.am
@@ -13,6 +13,7 @@ CPPCHECK_ARGS = \
   --error-exitcode=1 \
   --std=c99          \
   --inline-suppr     \
+  -ULIBCLAYER_PREFIX \
   --enable=warning,style,performance,portability
 
 CPPCHECK_INC = \