diff --git a/cache.h b/cache.h
index 5d36ffa1f2..c898a1dd7d 100644
--- a/cache.h
+++ b/cache.h
@@ -433,6 +433,7 @@ static inline enum object_type object_type(unsigned int mode)
 #define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
 #define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
 #define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
+#define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH"
 
 /*
  * This environment variable is expected to contain a boolean indicating
diff --git a/tmp-objdir.c b/tmp-objdir.c
index 9443868be1..780af8e752 100644
--- a/tmp-objdir.c
+++ b/tmp-objdir.c
@@ -147,6 +147,8 @@ struct tmp_objdir *tmp_objdir_create(void)
 	env_append(&t->env, ALTERNATE_DB_ENVIRONMENT,
 		   absolute_path(get_object_directory()));
 	env_replace(&t->env, DB_ENVIRONMENT, absolute_path(t->path.buf));
+	env_replace(&t->env, GIT_QUARANTINE_ENVIRONMENT,
+		    absolute_path(t->path.buf));
 
 	return t;
 }