diff --git a/packages/flutter_tools/lib/src/web/compiler_config.dart b/packages/flutter_tools/lib/src/web/compiler_config.dart
index 1d767200aa..88f81c8a5f 100644
--- a/packages/flutter_tools/lib/src/web/compiler_config.dart
+++ b/packages/flutter_tools/lib/src/web/compiler_config.dart
@@ -157,7 +157,7 @@ class WasmCompilerConfig extends WebCompilerConfig {
     return <String>[
       '-O$optimizationLevel',
       '--${stripSymbols ? '' : 'no-'}strip-wasm',
-      if (!sourceMaps) '--extra-compiler-option=--no-source-maps',
+      if (!sourceMaps) '--no-source-maps',
       if (buildMode == BuildMode.debug) '--extra-compiler-option=--enable-asserts',
     ];
   }
diff --git a/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart b/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart
index aeb17079d9..e14f4614ae 100644
--- a/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart
+++ b/packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart
@@ -1042,7 +1042,7 @@ void main() {
                     '--extra-compiler-option=--depfile=${depFile.absolute.path}',
                     '-O$level',
                     if (strip && buildMode == 'release') '--strip-wasm' else '--no-strip-wasm',
-                    if (!sourceMaps) '--extra-compiler-option=--no-source-maps',
+                    if (!sourceMaps) '--no-source-maps',
                     if (buildMode == 'debug') '--extra-compiler-option=--enable-asserts',
                     '-o',
                     environment.buildDir.childFile('main.dart.wasm').absolute.path,