diff --git a/src/transcode.c b/src/transcode.c
index 13cbf730..bccd7d02 100644
--- a/src/transcode.c
+++ b/src/transcode.c
@@ -499,6 +499,10 @@ struct transcoder* transcoder_new(char *flacname) {
 /* Read some bytes into the internal buffer and into the given buffer. */
 
 int transcoder_read(struct transcoder* trans, char* buff, int offset, int len) {
+    /* Client asked for more data than exists. */
+    if (offset > trans->totalsize) {
+        return 0;
+    }
     if (offset+len > trans->totalsize) {
         len = trans->totalsize - offset;
     }