diff --git a/apps/openmw/mwrender/ripples.cpp b/apps/openmw/mwrender/ripples.cpp
index 9d62184904..191ff0e714 100644
--- a/apps/openmw/mwrender/ripples.cpp
+++ b/apps/openmw/mwrender/ripples.cpp
@@ -184,19 +184,6 @@ namespace MWRender
         // FIXME: when we skip frames we need to preserve positions. this doesn't work now
         size_t ticks = 1;
 
-        // float referenceTime = state.getFrameStamp()->getReferenceTime();
-        // float frameTime = (mLastFrameTime != 0.0) ? referenceTime - mLastFrameTime : 0.0;
-        // frameTime = std::min(frameTime, 0.5f);
-
-        // mLastFrameTime = referenceTime;
-
-        // constexpr float rate = 60.0;
-        // constexpr float waveStep = 1.0 / rate;
-
-        // mRemainingWaveTime += frameTime;
-        // ticks = mRemainingWaveTime / waveStep;
-        // mRemainingWaveTime -= ticks * waveStep;
-
         // PASS: Blot in all ripple spawners
         mProgramBlobber->apply(state);
         state.apply(frameState.mStateset);
diff --git a/apps/openmw/mwrender/ripples.hpp b/apps/openmw/mwrender/ripples.hpp
index 8e7f9f0c0a..0d5b055eb5 100644
--- a/apps/openmw/mwrender/ripples.hpp
+++ b/apps/openmw/mwrender/ripples.hpp
@@ -79,10 +79,6 @@ namespace MWRender
 
         bool mPaused = false;
         bool mUseCompute = false;
-
-        // Read/written in draw thread only
-        mutable float mRemainingWaveTime = 0;
-        mutable double mLastFrameTime = 0;
     };
 
     class Ripples : public osg::Camera