diff --git a/git-gui/git-gui.sh b/git-gui/git-gui.sh
index 7358bc2c89..fa6995530b 100755
--- a/git-gui/git-gui.sh
+++ b/git-gui/git-gui.sh
@@ -1130,6 +1130,9 @@ set argv0dir [file dirname [file normalize $::argv0]]
 if {![info exists env(SSH_ASKPASS)]} {
 	set env(SSH_ASKPASS) [file join $argv0dir git-gui--askpass]
 }
+if {![info exists env(GIT_ASKPASS)]} {
+	set env(GIT_ASKPASS) [file join $argv0dir git-gui--askpass]
+}
 if {![info exists env(GIT_ASK_YESNO)]} {
 	set env(GIT_ASK_YESNO) [file join $argv0dir git-gui--askyesno]
 }