diff --git a/extensions/bindgen/private/bindgen.bzl b/extensions/bindgen/private/bindgen.bzl
index 426cdd48d1..41c37af2a1 100644
--- a/extensions/bindgen/private/bindgen.bzl
+++ b/extensions/bindgen/private/bindgen.bzl
@@ -241,7 +241,7 @@ def _rust_bindgen_impl(ctx):
     args.add_all(ctx.attr.bindgen_flags)
 
     rust_toolchain = ctx.toolchains[Label("@rules_rust//rust:toolchain_type")]
-    if "--rust-edition " not in [f.split("=")[0] for f in ctx.attr.bindgen_flags]:
+    if "--rust-edition" not in [f.split("=")[0] for f in ctx.attr.bindgen_flags]:
         args.add("--rust-edition=%s" % rust_toolchain.default_edition)
 
     args.add(header)