1 files changed, 1 insertions, 1 deletions
diff --git a/common.mk b/common.mk
index b8b3e99b4d..7e4963e14b 100644
--- a/common.mk
+++ b/common.mk
@@ -121,7 +121,7 @@ TESTRUN_SCRIPT = $(srcdir)/test.rb
 
 BOOTSTRAPRUBY = $(BASERUBY)
 
-COMPILE_PRELUDE = $(MINIRUBY) -I$(srcdir) -rrbconfig $(srcdir)/tool/compile_prelude.rb
+COMPILE_PRELUDE = $(MINIRUBY) -I$(srcdir) -I. -rrbconfig $(srcdir)/tool/compile_prelude.rb
 
 all: encs exts main