diff --git a/Foundation/CPKeyValueObserving.j b/Foundation/CPKeyValueObserving.j
index e4b55f752..4c08aee1e 100644
--- a/Foundation/CPKeyValueObserving.j
+++ b/Foundation/CPKeyValueObserving.j
@@ -209,7 +209,7 @@
             [[self mutableArrayValueForKeyPath:aKeyPath] removeObjectsAtIndexes:indexes];
 
         else if (changeKind === CPKeyValueChangeReplacement)
-            [[self mutableArrayValueForKeyPath:aKeyPath] replaceObjectAtIndexes:indexes withObjects:newValue];
+            [[self mutableArrayValueForKeyPath:aKeyPath] replaceObjectsAtIndexes:indexes withObjects:newValue];
     }
     else
     {
diff --git a/Foundation/CPPredicate/_CPFunctionExpression.j b/Foundation/CPPredicate/_CPFunctionExpression.j
index 7de9f0d73..1ae0e269e 100644
--- a/Foundation/CPPredicate/_CPFunctionExpression.j
+++ b/Foundation/CPPredicate/_CPFunctionExpression.j
@@ -220,7 +220,7 @@ var CPSelectorNameKey   = @"CPSelectorName",
 {
     if ([object isKindOfClass:[CPDictionary class]])
         return [object objectForKey:anIndex];
-    else ([object isKindOfClass:[CPArray class]])
+    else if ([object isKindOfClass:[CPArray class]])
         return [object objectAtIndex:anIndex];
 
     [CPException raise:CPInvalidArgumentException reason:@"object[#] requires a CPDictionary or CPArray"];