diff --git a/rc/tools/git.kak b/rc/tools/git.kak
index 3b53ebd1..e65374c6 100644
--- a/rc/tools/git.kak
+++ b/rc/tools/git.kak
@@ -157,7 +157,7 @@ define-command -params 1.. \
     update_diff() {
         (
             cd_bufdir
-            git --no-pager diff -U0 "$kak_buffile" | perl -e '
+            git --no-pager diff --no-ext-diff -U0 "$kak_buffile" | perl -e '
             $flags = $ENV{"kak_timestamp"};
             foreach $line (<STDIN>) {
                 if ($line =~ /@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))?/) {