diff --git a/Utilities/VirtualMemory.cpp b/Utilities/VirtualMemory.cpp
index e131ae66d..7eb31d274 100644
--- a/Utilities/VirtualMemory.cpp
+++ b/Utilities/VirtualMemory.cpp
@@ -7,6 +7,7 @@
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <errno.h>
 #include <unistd.h>
 #include <sys/types.h>
 #endif