diff --git a/SGPlayer/Classes/Core/SGData/SGFrame.m b/SGPlayer/Classes/Core/SGData/SGFrame.m
index 62f25289..6a57479e 100644
--- a/SGPlayer/Classes/Core/SGData/SGFrame.m
+++ b/SGPlayer/Classes/Core/SGData/SGFrame.m
@@ -73,6 +73,7 @@ - (void)lock
 - (void)unlock
 {
     [self->_lock lock];
+    NSAssert(self->_lockingCount > 0, @"SGFrame, Invalid locking count");
     self->_lockingCount -= 1;
     BOOL comeback = self->_lockingCount == 0;
     [self->_lock unlock];
diff --git a/SGPlayer/Classes/Core/SGData/SGPacket.m b/SGPlayer/Classes/Core/SGData/SGPacket.m
index b068d953..a780b612 100644
--- a/SGPlayer/Classes/Core/SGData/SGPacket.m
+++ b/SGPlayer/Classes/Core/SGData/SGPacket.m
@@ -78,6 +78,7 @@ - (void)lock
 - (void)unlock
 {
     [self->_lock lock];
+    NSAssert(self->_lockingCount > 0, @"SGPacket, Invalid locking count");
     self->_lockingCount -= 1;
     BOOL comeback = self->_lockingCount == 0;
     [self->_lock unlock];
diff --git a/SGPlayer/Classes/SGPlayerHeader.h b/SGPlayer/Classes/SGPlayerHeader.h
index f1d23158..e43f4c0c 100644
--- a/SGPlayer/Classes/SGPlayerHeader.h
+++ b/SGPlayer/Classes/SGPlayerHeader.h
@@ -85,7 +85,6 @@ FOUNDATION_EXPORT const unsigned char SGPlayerVersionString[];
 #import "SGOptions.h"
 #import "SGDemuxerOptions.h"
 #import "SGDecoderOptions.h"
-#import "SGRendererOptions.h"
 #import "SGProcessorOptions.h"
 
 #import "SGAudioDescriptor.h"