1 files changed, 2 insertions, 1 deletions
diff --git a/file.c b/file.c
index 6f3a4378fd..b2ad989df6 100644
--- a/file.c
+++ b/file.c
@@ -5683,9 +5683,10 @@ ruby_is_fd_loadable(int fd)
 
     if (S_ISREG(st.st_mode))
 	return 1;
-    if (S_ISFIFO(st.st_mode))
+    if (!S_ISDIR(st.st_mode))
 	return 1;
 
+    errno = EISDIR;
     return 0;
 #endif
 }