diff --git a/funcs/func_env.c b/funcs/func_env.c
index 072714f..d316849 100644
--- a/funcs/func_env.c
+++ b/funcs/func_env.c
@@ -710,12 +710,16 @@ static int file_read(struct ast_channel *chan, const char *cmd, char *data, stru
 		char dos_state = 0;
 		ast_debug(3, "offset=%" PRId64 ", length=%" PRId64 ", offset_offset=%" PRId64 ", length_offset=%" PRId64 "\n", offset, length, offset_offset, length_offset);
 		for (i = offset_offset; i < flength; i += sizeof(fbuf)) {
+			size_t nread;
 			char *pos;
-			if (fread(fbuf, 1, sizeof(fbuf), ff) < sizeof(fbuf) && !feof(ff)) {
+			if ((nread = fread(fbuf, 1, sizeof(fbuf), ff)) < sizeof(fbuf) && !feof(ff)) {
 				ast_log(LOG_ERROR, "Short read?!!\n");
 				fclose(ff);
 				return -1;
 			}
+			if (nread < sizeof(fbuf)) {
+				fbuf[nread] = '\0';
+			}
 			for (pos = fbuf; pos < fbuf + sizeof(fbuf); pos++) {
 				LINE_COUNTER(pos, format, current_length);