diff --git a/src/Font.cpp b/src/Font.cpp
index 5e200337a..57a5eaf64 100644
--- a/src/Font.cpp
+++ b/src/Font.cpp
@@ -502,7 +502,7 @@ TextCache* Font::buildTextCache(const std::string& text, float offsetX, float of
 		{
 			y += (float)getHeight();
 			x = offsetX;
-			memset(&vert[i], 0, 6 * sizeof(float));
+			memset(&vert[i], 0, 6 * sizeof(TextCache::Vertex));
 			continue;
 		}