diff --git a/Makefile b/Makefile
index ce26efa7dc..7262b7c942 100644
--- a/Makefile
+++ b/Makefile
@@ -888,7 +888,7 @@ LIB_OBJS += refs/packed-backend.o
 LIB_OBJS += refs/ref-cache.o
 LIB_OBJS += ref-filter.o
 LIB_OBJS += remote.o
-LIB_OBJS += replace_object.o
+LIB_OBJS += replace-object.o
 LIB_OBJS += repository.o
 LIB_OBJS += rerere.o
 LIB_OBJS += resolve-undo.o
diff --git a/replace_object.c b/replace-object.c
similarity index 100%
rename from replace_object.c
rename to replace-object.c