diff --git a/Makefile.am b/Makefile.am
index 00a92e34e03..3516b50385d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -6292,7 +6292,7 @@ valgrind-tests: $(TESTS)
 		if file $$f | grep -q shell; then \
 		echo -e "$${x}Skipping non-binary $$f"; else \
 		echo -e "$${x}Running $$f"; \
-		libtool --mode=execute valgrind -q --leak-check=full --max-stackframe=5242880 --error-exitcode=55 $(builddir)/$$f ; fi; \
+		$(LIBTOOL) --mode=execute valgrind -q --leak-check=full --max-stackframe=5242880 --error-exitcode=55 $(builddir)/$$f ; fi; \
 		x="\n\n"; \
 	done