diff --git a/tests/Makefile b/tests/Makefile
index e957653..36ee3f8 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -6,7 +6,7 @@ VALGRIND=valgrind
 VFLAGS=--leak-check=full --trace-children=yes --error-exitcode=1
 
 ifeq ($(DEBUG),1)
-	GDB=gdbserver host:2345
+	GDB=gdbserver :2345
 else
 	GDB=
 endif