Index: src/core/others/ojph_mem.c
--- src/core/others/ojph_mem.c.orig
+++ src/core/others/ojph_mem.c
@@ -50,6 +50,8 @@
 #define OJPH_OS_ANDROID
 #elif (defined __linux)
 #define OJPH_OS_LINUX
+#elif (defined __OpenBSD__)
+#define OJPH_OS_OPENBSD
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////
