Index: common/VectorIntrin.h
--- common/VectorIntrin.h.orig
+++ common/VectorIntrin.h
@@ -41,6 +41,8 @@
 
 #ifdef __APPLE__
 #include <stdlib.h> // alloca
+#elif __OpenBSD__
+#include <stdlib.h> // alloca
 #else
 #include <malloc.h> // alloca
 #endif
