diff --git a/pkgs/development/tools/sqsh/default.nix b/pkgs/development/tools/sqsh/default.nix
index 9c56efcb59fb..ba4a681a594d 100644
--- a/pkgs/development/tools/sqsh/default.nix
+++ b/pkgs/development/tools/sqsh/default.nix
@@ -14,9 +14,6 @@ in stdenv.mkDerivation rec {
 
   preConfigure = ''
     export SYBASE=${freetds}
-
-    substituteInPlace src/cmd_connect.c \
-      --replace CS_TDS_80 CS_TDS_73
   '' + lib.optionalString stdenv.isDarwin ''
     substituteInPlace configure --replace "libct.so" "libct.dylib"
   '';
@@ -27,6 +24,17 @@ in stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook ];
 
+  patches = [
+    (fetchurl {
+      # https://cvsweb.openbsd.org/cgi-bin/cvsweb/ports/databases/sqsh/patches/patch-src_cmd_connect_c
+      name = "patch-src_cmd_connect_c.patch";
+      url = "https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/ports/databases/sqsh/patches/patch-src_cmd_connect_c?rev=1.2&content-type=text/plain";
+      sha256 = "1dz97knr2h0a0ca1vq2mx6h8s3ns9jb1a0qraa4wkfmcdi3aqw0j";
+    })
+  ];
+
+  patchFlags = [ "-p0" ];
+
   meta = with lib; {
     description = "Command line tool for querying Sybase/MSSQL databases";
     longDescription = ''