1 files changed, 2 insertions, 3 deletions
diff --git a/io.c b/io.c
index f066099f5..56155e7b9 100644
--- a/io.c
+++ b/io.c
@@ -956,12 +956,11 @@ rb_io_fread(ptr, len, f)
 #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
 		  case EWOULDBLOCK:
 #endif
-		    if (len - n >= 0) {
+		    if (len > n) {
 			clearerr(f);
-			return len - n;
 		    }
 		}
-		return 0;
+		if (len == n) return 0;
 	    }
 	    *ptr = '\0';
 	    break;