diff --git a/src/tools/fs_shell/posix_compatibility.h b/src/tools/fs_shell/posix_compatibility.h
new file mode 100644
index 0000000000..d5693f0b60
--- /dev/null
+++ b/src/tools/fs_shell/posix_compatibility.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2007, Ingo Weinhold, bonefish@cs.tu-berlin.de.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _FSSH_POSIX_COMPATIBILITY_H
+#define _FSSH_POSIX_COMPATIBILITY_H
+
+// BeOS doesn't define [U]LLONG_{MIN,MAX}, but [U]LONGLONG_{MIN,MAX}
+#include <limits.h>
+#ifndef LLONG_MIN
+#	define LLONG_MIN	LONGLONG_MIN
+#	define LLONG_MAX	LONGLONG_MAX
+#	define ULLONG_MAX	ULONGLONG_MAX
+#endif
+
+#endif	// _FSSH_POSIX_COMPATIBILITY_H
+