diff --git a/common.mk b/common.mk
index 6646bd92b4..2056e9b2c3 100644
--- a/common.mk
+++ b/common.mk
@@ -164,7 +164,7 @@ GOLFOBJS      = goruby.$(OBJEXT) golf_prelude.$(OBJEXT)
 
 DEFAULT_PRELUDES = $(GEM_PRELUDE)
 PRELUDE_SCRIPTS = $(DEFAULT_PRELUDES)
-GEM_PRELUDE   = 
+GEM_PRELUDE   =
 PRELUDES      = {$(srcdir)}miniprelude.c
 GOLFPRELUDES  = {$(srcdir)}golf_prelude.c