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-rw-r--r--mrbgems/Makefile4gem2
1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/Makefile4gem b/mrbgems/Makefile4gem
index df972ddbb..7e54afc65 100644
--- a/mrbgems/Makefile4gem
+++ b/mrbgems/Makefile4gem
@@ -69,7 +69,7 @@ gem_mrblib_init.ctmp :
$(MRUBY_ROOT)/mrbgems/generator gem_mrblib $(GEM) > $@
gem_mrblib_irep.ctmp : gem_mrblib.rbtmp
- $(MRUBY_ROOT)/bin/mrbc -Bgem_mrblib_irep_$(GEM) -o$@ $<
+ $(MRUBY_ROOT)/bin/mrbc -Bgem_mrblib_irep_$(subst -,_,$(GEM)) -o$@ $<
gem_mrblib.rbtmp :
cat $(GEM_RB_FILES) > $@