diff --git a/configure/RULES_BUILD b/configure/RULES_BUILD
index 76765ed91..d678898c6 100644
--- a/configure/RULES_BUILD
+++ b/configure/RULES_BUILD
@@ -348,7 +348,7 @@ testspec: $(TESTSCRIPTS)
 test-results: tapfiles
 ifneq ($(TAPFILES),)
 ifdef RUNTESTS_ENABLED
-	prove --failures --ext .tap --exec cat --color $(TAPFILES)
+	prove --failures --ext .tap --exec "$(CAT)" --color $(TAPFILES)
 endif
 endif