diff --git a/src/texture.cpp b/src/texture.cpp
index f2c6473..442e486 100644
--- a/src/texture.cpp
+++ b/src/texture.cpp
@@ -10,7 +10,7 @@
 #include <endian.h>
 #include <vector>
 
-#define lengthof(a) (static_cast<int32_t>(sizeof(a)) / static_cast<int32_t>(sizeof(a[0])))
+#define lengthof(a) (static_cast<int32_t>(sizeof(a) / sizeof(a[0])))
 
 namespace cloonel {
 	namespace {