diff --git a/Mac/Compat/getwd.c b/Mac/Compat/getwd.c
index a783ff606a5..e9a54552981 100644
--- a/Mac/Compat/getwd.c
+++ b/Mac/Compat/getwd.c
@@ -28,7 +28,7 @@
 */
 
 #include "macdefs.h"
-#ifdef MPW
+#if defined(MPW) || defined(__MWERKS__)
 #include <Strings.h>
 #endif
 
diff --git a/Mac/Include/macdefs.h b/Mac/Include/macdefs.h
index c1e8a6e2753..6a5682f8b62 100644
--- a/Mac/Include/macdefs.h
+++ b/Mac/Include/macdefs.h
@@ -11,6 +11,9 @@
 #include <pascal.h>
 #endif
 
+#ifdef __MWERKS__
+#include "errno_unix.h"
+#endif
 #include <errno.h>
 #include <string.h>