diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index b7dbc7e1..be533c18 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -2771,3 +2771,6 @@ Mark Hawes <MARK.HAWES@au.fujitsu.com>
 Frank Niederwipper <f.niederwipper@gmail.com>
  for reporting a problem in timer handling in case a recording directory can't
  be created
+
+Chris Mayo <aklhfex@gmail.com>
+ for reporting a problem with detecting frames on radio channels
diff --git a/HISTORY b/HISTORY
index 88b3356c..93451753 100644
--- a/HISTORY
+++ b/HISTORY
@@ -6737,3 +6737,4 @@ Video Disk Recorder Revision History
 - The dvbsddevice plugin now supports the new option --outputonly, which disables
   receiving on SD FF devices and uses the device only for output (thanks to Udo
   Richter).
+- Fixed detecting frames on radio channels (reported by Chris Mayo).
diff --git a/remux.c b/remux.c
index 28188bd6..e6068439 100644
--- a/remux.c
+++ b/remux.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: remux.c 2.59 2011/08/20 09:07:26 kls Exp $
+ * $Id: remux.c 2.60 2011/08/27 14:20:18 kls Exp $
  */
 
 #include "remux.h"
@@ -840,7 +840,7 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
                     return Processed; // flush everything before this new payload
                  if (framesPerSecond <= 0.0) {
                     // frame rate unknown, so collect a sequence of PTS values:
-                    if (numPtsValues < MaxPtsValues && numIFrames < 2) { // collect a sequence containing at least two I-frames
+                    if (numPtsValues < 2 || numPtsValues < MaxPtsValues && numIFrames < 2) { // collect a sequence containing at least two I-frames
                        const uchar *Pes = Data + TsPayloadOffset(Data);
                        if (numIFrames && PesHasPts(Pes)) {
                           ptsValues[numPtsValues] = PesGetPts(Pes);