diff --git a/pkgs/applications/misc/xca/default.nix b/pkgs/applications/misc/xca/default.nix
index 5373d2394c1..ee07401d484 100644
--- a/pkgs/applications/misc/xca/default.nix
+++ b/pkgs/applications/misc/xca/default.nix
@@ -14,7 +14,7 @@ mkDerivation rec {
 
   postPatch = ''
     substituteInPlace doc/code2html \
-      --replace /usr/bin/perl ${perl}/bin/per l
+      --replace /usr/bin/perl ${perl}/bin/perl
   '';
 
   buildInputs = [ libtool openssl qtbase qttools ];