diff --git a/Makefile b/Makefile
index a25deb6..14a7d4f 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,7 @@
 $(binary):
 
 space :=
-space +=
+space := $(space) $(space)
 comma := ,
 
 strip_quotes = $(strip $(subst ",,$(1)))