1 files changed, 2 insertions, 2 deletions
diff --git a/setup.c b/setup.c
index 1b120175f..d0e3ecdcd 100644
--- a/setup.c
+++ b/setup.c
@@ -768,9 +768,9 @@ const char *setup_git_directory_gently(int *nongit_ok)
 
 	prefix = setup_git_directory_gently_1(nongit_ok);
 	if (prefix)
-		setenv("GIT_PREFIX", prefix, 1);
+		setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
 	else
-		setenv("GIT_PREFIX", "", 1);
+		setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
 
 	if (startup_info) {
 		startup_info->have_repository = !nongit_ok || !*nongit_ok;