diff --git a/src/analyzers/nyancatanalyzer.cpp b/src/analyzers/nyancatanalyzer.cpp
index 4a2ba57cc..2c018d13a 100644
--- a/src/analyzers/nyancatanalyzer.cpp
+++ b/src/analyzers/nyancatanalyzer.cpp
@@ -40,7 +40,7 @@ NyanCatAnalyzer::NyanCatAnalyzer(QWidget* parent)
       px_per_frame_(0),
       x_offset_(0),
       background_brush_(QColor(0x0f, 0x43, 0x73)) {
-  memset(history_, 0, arraysize(history_));
+  memset(history_, 0, arraysize(history_) * sizeof(*history_));
 
   for (int i = 0; i < kRainbowBands; ++i) {
     colors_[i] = QPen(QColor::fromHsv(i * 255 / kRainbowBands, 255, 255),