diff --git a/aegisub/src/video_context.cpp b/aegisub/src/video_context.cpp
index 67eac055f..fc9b59092 100644
--- a/aegisub/src/video_context.cpp
+++ b/aegisub/src/video_context.cpp
@@ -134,7 +134,6 @@ void VideoContext::Reset() {
 
 	keyFrames.clear();
 	videoFPS = agi::vfr::Framerate();
-	keyframesRevision++;
 
 	// Remove video data
 	frame_n = 0;
@@ -469,12 +468,10 @@ void VideoContext::LoadKeyframes(wxString filename) {
 	catch (...) {
 		wxMessageBox(_T("Unknown error"), _T("Error opening keyframes file"), wxOK | wxICON_ERROR, NULL);
 	}
-	keyframesRevision++;
 }
 
 void VideoContext::SaveKeyframes(wxString filename) {
 	KeyFrameFile::Save(filename, GetKeyFrames());
-	keyframesRevision++;
 }
 
 void VideoContext::CloseKeyframes() {
@@ -486,7 +483,6 @@ void VideoContext::CloseKeyframes() {
 		keyFrames.clear();
 	}
 	KeyframesOpen(keyFrames);
-	keyframesRevision++;
 }
 
 void VideoContext::LoadTimecodes(wxString filename) {
diff --git a/aegisub/src/video_context.h b/aegisub/src/video_context.h
index abff82a22..f8c2c31d3 100644
--- a/aegisub/src/video_context.h
+++ b/aegisub/src/video_context.h
@@ -102,10 +102,6 @@ private:
 	/// DOCME
 	wxString keyFramesFilename;
 
-	/// Revision counter for keyframes, when the set of keyframes is changed this number changes
-	int keyframesRevision;
-
-
 	/// DOCME
 	wxMutex playMutex;
 
@@ -270,7 +266,6 @@ public:
 	void CloseKeyframes();
 	bool OverKeyFramesLoaded() const { return !keyFramesFilename.empty(); }
 	bool KeyFramesLoaded() const { return !keyFrames.empty(); }
-	int GetKeyframesRevision() const { return keyframesRevision; }
 
 	wxString GetTimecodesName() const { return ovrTimecodeFile; }
 	void LoadTimecodes(wxString filename);