diff --git a/subreader.c b/subreader.c
index 66b52a0f7b..6ecf2f4c8b 100644
--- a/subreader.c
+++ b/subreader.c
@@ -25,7 +25,6 @@
 #endif
 
 #define ERR ((void *) -1)
-#define eol(x) ((x)=='\r' || (x)=='\n' || (x)=='\0')
 
 #ifdef USE_ICONV
 #include <iconv.h>
@@ -68,6 +67,10 @@ int sub_format=SUB_INVALID;
 unsigned long previous_sub_end;
 #endif
 
+static int eol(char p) {
+	return (p=='\r' || p=='\n' || p=='\0');
+}
+
 /* Remove leading and trailing space */
 static void trail_space(char *s) {
 	int i = 0;