diff --git a/src/ex_getln.c b/src/ex_getln.c
index 2475bb9..d292553 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -5040,7 +5040,7 @@
 	copy_option_part(&path, buf, MAXPATHL, ",");
 	if (STRLEN(buf) + STRLEN(file) + 2 < MAXPATHL)
 	{
-# ifdef WIN3264
+# if defined(MSWIN) || defined(MSDOS)
 	    /* Using the platform's path separator (\) makes vim incorrectly
 	     * treat it as an escape character, use '/' instead. */
 	    if (*buf != NUL && !after_pathsep(buf, buf + STRLEN(buf)))
diff --git a/src/misc1.c b/src/misc1.c
index 911ba4a..fd4e4fe 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -9374,7 +9374,7 @@
 	int j = 0;
 
 	while ((fname[j] == path_part[i][j]
-#if defined(WIN3264)
+# if defined(MSWIN) || defined(MSDOS)
 		|| (vim_ispathsep(fname[j]) && vim_ispathsep(path_part[i][j]))
 #endif
 			     ) && fname[j] != NUL && path_part[i][j] != NUL)
@@ -9389,7 +9389,7 @@
     /* Skip to the file or directory name */
     if (cutoff != NULL)
 	while (
-#if defined(WIN3264)
+# if defined(MSWIN) || defined(MSDOS)
 		*cutoff == '/'
 #else
 		vim_ispathsep(*cutoff)
@@ -9460,7 +9460,7 @@
 
 	len = (int)STRLEN(path);
 	while (dir_end > path &&
-#if defined(WIN3264)
+# if defined(MSWIN) || defined(MSDOS)
 		*dir_end != '/'
 #else
 		!vim_ispathsep(*dir_end)