diff --git a/pkgs/development/libraries/lib2geom/default.nix b/pkgs/development/libraries/lib2geom/default.nix
index 72d21ed0d2c4..b09e7dcb739a 100644
--- a/pkgs/development/libraries/lib2geom/default.nix
+++ b/pkgs/development/libraries/lib2geom/default.nix
@@ -1,4 +1,5 @@
 { stdenv
+, fetchpatch
 , fetchFromGitLab
 , cmake
 , ninja
@@ -25,6 +26,16 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-SNo5YT7o29zdxkHLuy9MT88qBg/U1Wwa3BWShF5ACTc=";
   };
 
+  patches = [
+    # Fixed upstream, remove when the new version releases:
+    # https://gitlab.com/inkscape/lib2geom/-/issues/49
+    (fetchpatch {
+      name = "expect-double-eq-in-choose-test.patch";
+      url = "https://gitlab.com/inkscape/lib2geom/-/commit/5b7c75dd3841cb415f163f0a81f556c57d3e0a83.patch";
+      sha256 = "RMgwJkylrGFTTrqBzqs5j2LMSLsHhcE/UT1pKBZnU50=";
+    })
+  ];
+
   nativeBuildInputs = [
     cmake
     ninja