diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp
index 2b81295ff9..596ebe1194 100644
--- a/src/common/host_memory.cpp
+++ b/src/common/host_memory.cpp
@@ -45,8 +45,15 @@
 #   define MAP_ANONYMOUS MAP_ANON
 #endif
 // PlayStation 4
+// Flag needs to be undef-ed on non PS4 since it has different semantics
+// on some platforms.
 #ifndef MAP_SYSTEM
-#   define MAP_SYSTEM 0
+#   ifdef __OPENORBIS__
+#       define MAP_SYSTEM 0x2000
+#   else
+#       undef MAP_SYSTEM
+#       define MAP_SYSTEM 0
+#   endif
 #endif
 
 #endif // ^^^ POSIX ^^^