3 files changed, 4 insertions, 1 deletions
diff --git a/t/helper/test-mergesort.c b/t/helper/test-mergesort.c
index 335cf6b626..c5cffaa4b7 100644
--- a/t/helper/test-mergesort.c
+++ b/t/helper/test-mergesort.c
@@ -1,3 +1,4 @@
+#include "test-tool.h"
 #include "cache.h"
 #include "mergesort.h"
 
@@ -22,7 +23,7 @@ static int compare_strings(const void *a, const void *b)
 	return strcmp(x->text, y->text);
 }
 
-int cmd_main(int argc, const char **argv)
+int cmd__mergesort(int argc, const char **argv)
 {
 	struct line *line, *p = NULL, *lines = NULL;
 	struct strbuf sb = STRBUF_INIT;
diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c
index 16c78833a4..5d470158b1 100644
--- a/t/helper/test-tool.c
+++ b/t/helper/test-tool.c
@@ -21,6 +21,7 @@ static struct test_cmd cmds[] = {
 	{ "index-version", cmd__index_version },
 	{ "lazy-init-name-hash", cmd__lazy_init_name_hash },
 	{ "match-trees", cmd__match_trees },
+	{ "mergesort", cmd__mergesort },
 	{ "sha1", cmd__sha1 },
 };
 
diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h
index d2f009cb3e..6c9437ff5e 100644
--- a/t/helper/test-tool.h
+++ b/t/helper/test-tool.h
@@ -15,6 +15,7 @@ int cmd__hashmap(int argc, const char **argv);
 int cmd__index_version(int argc, const char **argv);
 int cmd__lazy_init_name_hash(int argc, const char **argv);
 int cmd__match_trees(int argc, const char **argv);
+int cmd__mergesort(int argc, const char **argv);
 int cmd__sha1(int argc, const char **argv);
 
 #endif