diff --git a/MagicalRecord/Categories/DataImport/NSObject+MagicalDataImport.m b/MagicalRecord/Categories/DataImport/NSObject+MagicalDataImport.m
index 9feaf23..900d78f 100644
--- a/MagicalRecord/Categories/DataImport/NSObject+MagicalDataImport.m
+++ b/MagicalRecord/Categories/DataImport/NSObject+MagicalDataImport.m
@@ -31,7 +31,7 @@ NSUInteger const kMagicalRecordImportMaximumAttributeFailoverDepth = 10;
     
     for (NSUInteger i = 1; i < kMagicalRecordImportMaximumAttributeFailoverDepth && value == nil; i++)
     {
-        attributeName = [NSString stringWithFormat:@"%@.%u", kMagicalRecordImportAttributeKeyMapKey, i];
+        attributeName = [NSString stringWithFormat:@"%@.%lu", kMagicalRecordImportAttributeKeyMapKey, (unsigned long)i];
         lookupKey = [[attributeInfo userInfo] valueForKey:attributeName];
         if (lookupKey == nil) 
         {
diff --git a/MagicalRecord/Categories/NSManagedObject/NSManagedObject+MagicalRecord.m b/MagicalRecord/Categories/NSManagedObject/NSManagedObject+MagicalRecord.m
index d466291..8bd7a8e 100644
--- a/MagicalRecord/Categories/NSManagedObject/NSManagedObject+MagicalRecord.m
+++ b/MagicalRecord/Categories/NSManagedObject/NSManagedObject+MagicalRecord.m
@@ -118,7 +118,7 @@ static NSUInteger defaultBatchSize = kMagicalRecordDefaultBatchSize;
 			}
 			else
 			{
-				MRLog(@"Property '%@' not found in %u properties for %@", propertyName, [propDict count], NSStringFromClass(self));
+				MRLog(@"Property '%@' not found in %lx properties for %@", propertyName, (unsigned long)[propDict count], NSStringFromClass(self));
 			}
 		}
 	}
diff --git a/MagicalRecord/Categories/NSManagedObjectContext/NSManagedObjectContext+MagicalRecord.m b/MagicalRecord/Categories/NSManagedObjectContext/NSManagedObjectContext+MagicalRecord.m
index c1e4b32..abc8e4f 100644
--- a/MagicalRecord/Categories/NSManagedObjectContext/NSManagedObjectContext+MagicalRecord.m
+++ b/MagicalRecord/Categories/NSManagedObjectContext/NSManagedObjectContext+MagicalRecord.m
@@ -172,7 +172,7 @@ static id iCloudSetupNotificationObserver = nil;
     NSManagedObjectContext *context = (NSManagedObjectContext *)notification.object;
     if (context.insertedObjects.count > 0) {
         NSArray *insertedObjects = [[context insertedObjects] allObjects];
-        MRLog(@"Context %@ is about to save. Obtaining permanent IDs for new %d inserted objects", [context MR_description], insertedObjects.count);
+        MRLog(@"Context %@ is about to save. Obtaining permanent IDs for new %lu inserted objects", [context MR_description], (unsigned long)[insertedObjects count]);
         NSError *error;
         [context obtainPermanentIDsForObjects:insertedObjects error:&error];
         [MagicalRecord handleErrors:error];