diff --git a/packages/google_maps_flutter/CHANGELOG.md b/packages/google_maps_flutter/CHANGELOG.md
index e775241f7598..2c83c6449da9 100644
--- a/packages/google_maps_flutter/CHANGELOG.md
+++ b/packages/google_maps_flutter/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.5.21+10
+
+* Cast error.code to unsigned long to avoid using NSInteger as %ld format warnings.
+
 ## 0.5.21+9
 
 * Remove AndroidX warnings.
diff --git a/packages/google_maps_flutter/ios/Classes/GoogleMapMarkerController.m b/packages/google_maps_flutter/ios/Classes/GoogleMapMarkerController.m
index 91b4e7bce2b7..2f0d4a989b9d 100644
--- a/packages/google_maps_flutter/ios/Classes/GoogleMapMarkerController.m
+++ b/packages/google_maps_flutter/ios/Classes/GoogleMapMarkerController.m
@@ -189,7 +189,7 @@ static void InterpretInfoWindow(id<FLTGoogleMapMarkerOptionsSink> sink, NSDictio
     } else {
       NSString* error =
           [NSString stringWithFormat:@"'fromAssetImage' should have exactly 3 arguments. Got: %lu",
-                                     iconData.count];
+                                     (unsigned long)iconData.count];
       NSException* exception = [NSException exceptionWithName:@"InvalidBitmapDescriptor"
                                                        reason:error
                                                      userInfo:nil];
@@ -209,7 +209,7 @@ static void InterpretInfoWindow(id<FLTGoogleMapMarkerOptionsSink> sink, NSDictio
     } else {
       NSString* error = [NSString
           stringWithFormat:@"fromBytes should have exactly one argument, the bytes. Got: %lu",
-                           iconData.count];
+                           (unsigned long)iconData.count];
       NSException* exception = [NSException exceptionWithName:@"InvalidByteDescriptor"
                                                        reason:error
                                                      userInfo:nil];