diff --git a/include/my_alloca.h b/include/my_alloca.h
index 761c2adb890..25fd8867e69 100644
--- a/include/my_alloca.h
+++ b/include/my_alloca.h
@@ -16,6 +16,8 @@
 #ifndef MY_ALLOCA_INCLUDED
 #define MY_ALLOCA_INCLUDED
 
+#include <my_config.h>
+
 #ifdef _WIN32
 #include <malloc.h> /*for alloca*/
 /*