--- a/image/SurfaceFilters.h
+++ b/image/SurfaceFilters.h
@@ -120,17 +120,17 @@ public:
   }
 
 protected:
   uint8_t* DoResetToFirstRow() override
   {
     mNext.ResetToFirstRow();
     mPass = 0;
     mInputRow = 0;
-    mOutputRow = InterlaceOffset(mPass);;
+    mOutputRow = InterlaceOffset(mPass);
     return GetRowPointer(mOutputRow);
   }
 
   uint8_t* DoAdvanceRow() override
   {
     if (mPass >= 4) {
       return nullptr;  // We already finished all passes.
     }