1 files changed, 1 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 1b0b24c21c..dcf1a94094 100644
--- a/diff.c
+++ b/diff.c
@@ -5,6 +5,7 @@
 #include "abspath.h"
 #include "alloc.h"
 #include "config.h"
+#include "environment.h"
 #include "gettext.h"
 #include "tempfile.h"
 #include "quote.h"