Index: src/OFHMAC.m
==================================================================
--- src/OFHMAC.m
+++ src/OFHMAC.m
@@ -105,10 +105,12 @@
 		[_innerHash updateWithBuffer: innerKeyPadItems
 				      length: blockSize];
 	} @catch (id e) {
 		[outerKeyPad zero];
 		[innerKeyPad zero];
+
+		@throw e;
 	}
 
 	objc_autoreleasePoolPop(pool);
 
 	_outerHashCopy = [_outerHash copy];