diff --git a/Makefile.am b/Makefile.am
index 77c0d62..039a8f9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -57,7 +57,7 @@ endif
 
 if ENABLE_CPPCHECK
 cppcheck:
-	$(CPPCHECK) -q -v -f --enable=all -i tool/cmdline.c lib tool
+	$(CPPCHECK) -q -v -f --enable=all -i tool/cmdline.c lib tool ykcs11
 endif
 
 # Maintainer rules.