diff --git a/ext/alsa/gstalsasrc.c b/ext/alsa/gstalsasrc.c
index 6ee0ca8870..d665f6e3ac 100644
--- a/ext/alsa/gstalsasrc.c
+++ b/ext/alsa/gstalsasrc.c
@@ -118,6 +118,7 @@ gst_alsasrc_finalize (GObject * object)
 
   g_free (src->device);
   g_mutex_clear (&src->alsa_lock);
+  g_mutex_clear (&src->delay_lock);
 
   G_OBJECT_CLASS (parent_class)->finalize (object);
 }
@@ -275,6 +276,7 @@ gst_alsasrc_init (GstAlsaSrc * alsasrc)
   alsasrc->driver_timestamps = FALSE;
 
   g_mutex_init (&alsasrc->alsa_lock);
+  g_mutex_init (&alsasrc->delay_lock);
 }
 
 #define CHECK(call, error) \
@@ -958,7 +960,11 @@ gst_alsasrc_read (GstAudioSrc * asrc, gpointer data, guint length,
 
   GST_ALSA_SRC_LOCK (asrc);
   while (cptr > 0) {
-    if ((err = snd_pcm_readi (alsa->handle, ptr, cptr)) < 0) {
+    GST_DELAY_SRC_LOCK (asrc);
+    err = snd_pcm_readi (alsa->handle, ptr, cptr);
+    GST_DELAY_SRC_UNLOCK (asrc);
+
+    if (err < 0) {
       if (err == -EAGAIN) {
         GST_DEBUG_OBJECT (asrc, "Read error: %s", snd_strerror (err));
         continue;
@@ -1005,7 +1011,9 @@ gst_alsasrc_delay (GstAudioSrc * asrc)
 
   alsa = GST_ALSA_SRC (asrc);
 
+  GST_DELAY_SRC_LOCK (asrc);
   res = snd_pcm_delay (alsa->handle, &delay);
+  GST_DELAY_SRC_UNLOCK (asrc);
   if (G_UNLIKELY (res < 0)) {
     GST_DEBUG_OBJECT (alsa, "snd_pcm_delay returned %d", res);
     delay = 0;
diff --git a/ext/alsa/gstalsasrc.h b/ext/alsa/gstalsasrc.h
index 57e27015ad..54abb0a0cc 100644
--- a/ext/alsa/gstalsasrc.h
+++ b/ext/alsa/gstalsasrc.h
@@ -39,6 +39,10 @@ G_BEGIN_DECLS
 #define GST_ALSA_SRC_LOCK(obj)      (g_mutex_lock (GST_ALSA_SRC_GET_LOCK (obj)))
 #define GST_ALSA_SRC_UNLOCK(obj)    (g_mutex_unlock (GST_ALSA_SRC_GET_LOCK (obj)))
 
+#define GST_DELAY_SRC_GET_LOCK(obj) (&GST_ALSA_SRC_CAST (obj)->delay_lock)
+#define GST_DELAY_SRC_LOCK(obj)     (g_mutex_lock (GST_DELAY_SRC_GET_LOCK (obj)))
+#define GST_DELAY_SRC_UNLOCK(obj)   (g_mutex_unlock (GST_DELAY_SRC_GET_LOCK (obj)))
+
 typedef struct _GstAlsaSrc GstAlsaSrc;
 typedef struct _GstAlsaSrcClass GstAlsaSrcClass;
 
@@ -71,6 +75,7 @@ struct _GstAlsaSrc {
   snd_pcm_uframes_t     period_size;
 
   GMutex                alsa_lock;
+  GMutex                delay_lock;
 };
 
 struct _GstAlsaSrcClass {