diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6b98f18873..034eed67f0 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -248,7 +248,7 @@ TESTS_ENVIRONMENT =				\
 
 
 valgrind:
-	$(MAKE) check VG="valgrind --quiet --leak-check=full --suppressions=$(srcdir)/.valgrind.supp"
+	$(MAKE) check VG="libtool --mode=execute valgrind --quiet --leak-check=full --suppressions=$(srcdir)/.valgrind.supp"
 
 sockettest_SOURCES = \
 	sockettest.c \