diff --git a/make.h b/make.h
index 5ff702c3..49700bba 100644
--- a/make.h
+++ b/make.h
@@ -252,6 +252,12 @@ extern char *alloca ();
 #define	ENUM_BITFIELD(bits)
 #endif
 
+#ifdef __MSDOS__
+#define PATH_SEPARATOR_CHAR ';'
+#else
+#define PATH_SEPARATOR_CHAR ':'
+#endif
+
 extern void die ();
 extern void message (), fatal (), error ();
 extern void makefile_error (), makefile_fatal ();