diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c
index 8c71edba..16dba14b 100644
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -853,6 +853,7 @@ static int snd_pcm_dmix_htimestamp(snd_pcm_t *pcm,
 			break;
 		*avail = avail1;
 		*tstamp = snd_pcm_hw_fast_tstamp(dmix->spcm);
+		ok = 1;
 	}
 	return 0;
 }
diff --git a/src/pcm/pcm_dshare.c b/src/pcm/pcm_dshare.c
index 6638dc4a..1bdb670b 100644
--- a/src/pcm/pcm_dshare.c
+++ b/src/pcm/pcm_dshare.c
@@ -543,6 +543,7 @@ static int snd_pcm_dshare_htimestamp(snd_pcm_t *pcm,
 			break;
 		*avail = avail1;
 		*tstamp = snd_pcm_hw_fast_tstamp(dshare->spcm);
+		ok = 1;
 	}
 	return 0;
 }
diff --git a/src/pcm/pcm_dsnoop.c b/src/pcm/pcm_dsnoop.c
index 9df6c7e8..ea07e041 100644
--- a/src/pcm/pcm_dsnoop.c
+++ b/src/pcm/pcm_dsnoop.c
@@ -458,6 +458,7 @@ static int snd_pcm_dsnoop_htimestamp(snd_pcm_t *pcm,
 			break;
 		*avail = avail1;
 		*tstamp = snd_pcm_hw_fast_tstamp(dsnoop->spcm);
+		ok = 1;
 	}
 	return 0;
 }