diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
index 3c7436b20a4..cacce00257f 100644
--- a/src/corelib/io/qfilesystemengine_unix.cpp
+++ b/src/corelib/io/qfilesystemengine_unix.cpp
@@ -19,6 +19,7 @@
 # include <QtCore/private/qtemporaryfile_p.h>
 #endif // QT_BOOTSTRAPPED
 
+#include <grp.h>
 #include <pwd.h>
 #include <stdlib.h> // for realpath()
 #include <unistd.h>