diff --git a/Makefile.am b/Makefile.am
index 8e73284cb12a32aa1196f4b21811a58c8cec4b0c..f6f6962f9d61c8b3fe3c2878a104b4a6b957eb0c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -16,12 +16,13 @@ AM_DISTCHECK_CONFIGURE_FLAGS =
 
 CODE_COVERAGE_INFO = coverage.info
 CODE_COVERAGE_HTML = coverage.html
-CODE_COVERAGE_DIRS =	\
-	src/knot	\
-	src/libknot	\
-	src/zscanner	\
-	src/dnssec/lib	\
-	src/dnssec/shared
+CODE_COVERAGE_DIRS =		\
+	src/contrib		\
+	src/dnssec/lib		\
+	src/dnssec/shared	\
+	src/knot		\
+	src/libknot		\
+	src/zscanner
 
 code_coverage_quiet = --quiet