diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 378928518b..5886835fbf 100644
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -332,13 +332,20 @@ create_virtual_base() {
 # Platform specific tweaks to work around some commands
 case $(uname -s) in
 *MINGW*)
-	# Windows has its own (incompatible) sort and find
-	sort () {
-		/usr/bin/sort "$@"
-	}
-	find () {
-		/usr/bin/find "$@"
-	}
+	if test -x /usr/bin/sort
+	then
+		# Windows has its own (incompatible) sort; override
+		sort () {
+			/usr/bin/sort "$@"
+		}
+	fi
+	if test -x /usr/bin/find
+	then
+		# Windows has its own (incompatible) find; override
+		find () {
+			/usr/bin/find "$@"
+		}
+	fi
 	# git sees Windows-style pwd
 	pwd () {
 		builtin pwd -W
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 3f43ccef5e..26a0933764 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -1343,13 +1343,20 @@ yes () {
 uname_s=$(uname -s)
 case $uname_s in
 *MINGW*)
-	# Windows has its own (incompatible) sort and find
-	sort () {
-		/usr/bin/sort "$@"
-	}
-	find () {
-		/usr/bin/find "$@"
-	}
+	if test -x /usr/bin/sort
+	then
+		# Windows has its own (incompatible) sort; override
+		sort () {
+			/usr/bin/sort "$@"
+		}
+	fi
+	if test -x /usr/bin/find
+	then
+		# Windows has its own (incompatible) find; override
+		find () {
+			/usr/bin/find "$@"
+		}
+	fi
 	# git sees Windows-style pwd
 	pwd () {
 		builtin pwd -W