diff --git a/include/gtkwave/wavealloca.h b/include/gtkwave/wavealloca.h
index 951d7b2f7..8fa7d8090 100644
--- a/include/gtkwave/wavealloca.h
+++ b/include/gtkwave/wavealloca.h
@@ -35,9 +35,6 @@
 #else
 #include <malloc.h>
 #endif
-#elif defined(_MSC_VER)
-#include <malloc.h>
-#define alloca _alloca
 #endif
 #define wave_alloca alloca
 #endif