diff --git a/bin/qt5_tool b/bin/qt5_tool
index ab236dc1d33857bab74cf517a52c1cd4afdc3eff..55409f5db39e11c279519a5d6ac3f5980df88ba4 100755
--- a/bin/qt5_tool
+++ b/bin/qt5_tool
@@ -783,6 +783,7 @@ if (defined $optGitHooks) {
     if ($os == $OS_WINDOWS) {
         # rewrite from "C:/Users/qt" to "/C/Users/qt" so that msysgit understand
         $postcommitpath =~ s,([A-Za-z]):,/$1,;
+        $postcommitpath =~ s,\\,/,g;
     }
     print "Installing post-commit hooks\n";
     foreach my $MOD (@MODULES) {