diff --git a/pkgs/development/php-packages/rrd/default.nix b/pkgs/development/php-packages/rrd/default.nix
index 4b5aa83a09ab..8bcaeadd5085 100644
--- a/pkgs/development/php-packages/rrd/default.nix
+++ b/pkgs/development/php-packages/rrd/default.nix
@@ -19,6 +19,10 @@ buildPecl {
     pkg-config
   ];
 
+  # Fix GCC 14 build.
+  # from incompatible pointer type [-Wincompatible-pointer-types
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=incompatible-pointer-types";
+
   meta = {
     description = "PHP bindings to RRD tool system";
     license = lib.licenses.bsd0;