diff --git a/Classes/Properties/Parsers/OCFInvocationParser.m b/Classes/Properties/Parsers/OCFInvocationParser.m
index 113add3..dbd9827 100644
--- a/Classes/Properties/Parsers/OCFInvocationParser.m
+++ b/Classes/Properties/Parsers/OCFInvocationParser.m
@@ -96,7 +96,7 @@ + (void)parsePointerSetterInvocation:(NSInvocation *)invocation instance:(id)ins
 + (void)parsePrimitiveSetterInvocation:(NSInvocation *)invocation instance:(id)instance
                             attributes:(OCFPropertyAttributes *)attributes
 {
-    size_t size = 0;
+    NSUInteger size = 0;
     const char *type = attributes.type.ASCIIString;
     const char *key = attributes.key;
     NSGetSizeAndAlignment(type, &size, NULL);
@@ -133,7 +133,7 @@ + (void)parsePrimitiveGetterInvocation:(NSInvocation *)invocation instance:(id)i
 {
     const char *type = attributes.type.ASCIIString;
     const char *key = attributes.key;
-    size_t size = 0;
+    NSUInteger size = 0;
     NSGetSizeAndAlignment(type, &size, NULL);
     void *buffer = calloc(1, size);
     NSValue *store = objc_getAssociatedObject(instance, key);
diff --git a/Spec/OCFuntimeSpec/Mocks/OCFMethodMock.m b/Spec/OCFuntimeSpec/Mocks/OCFMethodMock.m
index cbc8820..e598d72 100644
--- a/Spec/OCFuntimeSpec/Mocks/OCFMethodMock.m
+++ b/Spec/OCFuntimeSpec/Mocks/OCFMethodMock.m
@@ -30,7 +30,7 @@ - (NSObject *)funInstanceMethodWithArg:(NSObject *)arg
 
 + (NSUInteger)funClassMethodWithArg:(NSUInteger)arg
 {
-    NSLog(@"This is FUN class method with arg %i", arg);
+    NSLog(@"This is FUN class method with arg %@", @(arg));
     return 0;
 }