diff --git a/objectivec/GPBMessage.h b/objectivec/GPBMessage.h
index 58c42d02..2249829f 100644
--- a/objectivec/GPBMessage.h
+++ b/objectivec/GPBMessage.h
@@ -55,13 +55,6 @@ typedef NS_ENUM(NSInteger, GPBMessageErrorCode) {
   GPBMessageErrorCodeMissingRequiredField = -101,
 };
 
-#ifdef DEBUG
-/// In DEBUG ONLY, an NSException is thrown when a parsed message doesn't
-/// contain required fields. This key allows you to retrieve the parsed message
-/// from the exception's @c userInfo dictionary.
-extern NSString *const GPBExceptionMessageKey;
-#endif  // DEBUG
-
 CF_EXTERN_C_END
 
 /// Base class for all of the generated message classes.
diff --git a/objectivec/GPBMessage.m b/objectivec/GPBMessage.m
index d1c5594c..f1cb3927 100644
--- a/objectivec/GPBMessage.m
+++ b/objectivec/GPBMessage.m
@@ -53,11 +53,6 @@
 NSString *const GPBMessageErrorDomain =
     GPBNSStringifySymbol(GPBMessageErrorDomain);
 
-#ifdef DEBUG
-NSString *const GPBExceptionMessageKey =
-    GPBNSStringifySymbol(GPBExceptionMessage);
-#endif  // DEBUG
-
 static NSString *const kGPBDataCoderKey = @"GPBData";
 
 //