diff --git a/win32/readdir.c b/win32/readdir.c
index 0edd5764d49..4e5992167c9 100644
--- a/win32/readdir.c
+++ b/win32/readdir.c
@@ -37,7 +37,7 @@ DIR *opendir(const char *dir)
 		return NULL;
 	}
 	strcpy(filespec, resolved_path_buff);
-	index = strlen(filespec) - 1;
+	index = (int)strlen(filespec) - 1;
 	if (index >= 0 && (filespec[index] == '/' || 
 	   (filespec[index] == '\\' && (index == 0 || !IsDBCSLeadByte(filespec[index-1])))))
 		filespec[index] = '\0';
@@ -83,7 +83,7 @@ struct dirent *readdir(DIR *dp)
 
 	strlcpy(dp->dent.d_name, dp->fileinfo.cFileName, _MAX_FNAME+1);
 	dp->dent.d_ino = 1;
-	dp->dent.d_reclen = strlen(dp->dent.d_name);
+	dp->dent.d_reclen = (unsigned short)strlen(dp->dent.d_name);
 	dp->dent.d_off = dp->offset;
 
 	return &(dp->dent);
@@ -107,7 +107,7 @@ int readdir_r(DIR *dp, struct dirent *entry, struct dirent **result)
 
 	strlcpy(dp->dent.d_name, dp->fileinfo.cFileName, _MAX_FNAME+1);
 	dp->dent.d_ino = 1;
-	dp->dent.d_reclen = strlen(dp->dent.d_name);
+	dp->dent.d_reclen = (unsigned short)strlen(dp->dent.d_name);
 	dp->dent.d_off = dp->offset;
 
 	memcpy(entry, &dp->dent, sizeof(*entry));
@@ -152,7 +152,7 @@ int rewinddir(DIR *dp)
 	}
 
 	strcpy(filespec, dp->dir);
-	index = strlen(filespec) - 1;
+	index = (int)strlen(filespec) - 1;
 	if (index >= 0 && (filespec[index] == '/' || 
 	   (filespec[index] == '\\' && (index == 0 || !IsDBCSLeadByte(filespec[index-1])))))
 		filespec[index] = '\0';