diff --git a/tests/cms/Makefile.am b/tests/cms/Makefile.am
index 999bd4fb8..44bd1ceab 100644
--- a/tests/cms/Makefile.am
+++ b/tests/cms/Makefile.am
@@ -34,7 +34,7 @@ AM_CFLAGS =
 OLD_TESTS_ENVIRONMENT = GNUPGHOME=`/bin/pwd` GPG_AGENT_INFO= LC_ALL=C \
                         GNUPG_BUILD_ROOT="$(abs_top_builddir)" \
 			GNUPG_IN_TEST_SUITE=fact \
-	                GPGSM="$(GPGSM)" "$(srcdir)/runtest"
+	                GPGSM="$(GPGSM)$(EXEEXT)" "$(srcdir)/runtest"
 
 TESTS_ENVIRONMENT = LC_ALL=C \
 	EXEEXT=$(EXEEXT) \