diff --git a/plugins/test/Makefile b/plugins/test/Makefile
index a65ae8b11..67591ecc5 100644
--- a/plugins/test/Makefile
+++ b/plugins/test/Makefile
@@ -4,7 +4,7 @@ PLUGIN_TEST_SRC := $(wildcard plugins/test/run-*.c)
 PLUGIN_TEST_OBJS := $(PLUGIN_TEST_SRC:.c=.o)
 PLUGIN_TEST_PROGRAMS := $(PLUGIN_TEST_OBJS:.o=)
 
-ALL_C_SOURCES += $(PLUGIN__TEST_SRC)
+ALL_C_SOURCES += $(PLUGIN_TEST_SRC)
 ALL_TEST_PROGRAMS += $(PLUGIN_TEST_PROGRAMS)
 
 PLUGIN_TEST_COMMON_OBJS :=			\