diff --git a/src/modules/bluetooth/backend-native.c b/src/modules/bluetooth/backend-native.c
index 9994fa571..f601c0d78 100644
--- a/src/modules/bluetooth/backend-native.c
+++ b/src/modules/bluetooth/backend-native.c
@@ -365,6 +365,10 @@ static ssize_t sco_transport_write(pa_bluetooth_transport *t, int fd, const void
 
     pa_assert(t);
 
+    /* since SCO setup is symmetric, fix write MTU to be size of last read packet */
+    if (t->last_read_size)
+        write_mtu = PA_MIN(t->last_read_size, write_mtu);
+
     /* if encoder buffer has less data than required to make complete packet */
     if (size < write_mtu)
         return 0;
@@ -386,6 +390,11 @@ static ssize_t sco_transport_write(pa_bluetooth_transport *t, int fd, const void
             pa_log_debug("Got EAGAIN on write() after POLLOUT, probably there is a temporary connection loss.");
             /* Drain write buffer */
             written = size;
+        } else if (errno == EINVAL && t->last_read_size == 0) {
+            /* Likely write_link_mtu is still wrong, retry after next successful read */
+            pa_log_debug("got write EINVAL, next successful read should fix MTU");
+            /* Drain write buffer */
+            written = size;
         } else {
             pa_log_error("Failed to write data to socket: %s", pa_cstrerror(errno));
             /* Report error from write call */
diff --git a/src/modules/bluetooth/backend-ofono.c b/src/modules/bluetooth/backend-ofono.c
index d8c3b83e6..8a4c2c913 100644
--- a/src/modules/bluetooth/backend-ofono.c
+++ b/src/modules/bluetooth/backend-ofono.c
@@ -90,6 +90,10 @@ static ssize_t sco_transport_write(pa_bluetooth_transport *t, int fd, const void
 
     pa_assert(t);
 
+    /* since SCO setup is symmetric, fix write MTU to be size of last read packet */
+    if (t->last_read_size)
+        write_mtu = PA_MIN(t->last_read_size, write_mtu);
+
     /* if encoder buffer has less data than required to make complete packet */
     if (size < write_mtu)
         return 0;
@@ -111,6 +115,11 @@ static ssize_t sco_transport_write(pa_bluetooth_transport *t, int fd, const void
             pa_log_debug("Got EAGAIN on write() after POLLOUT, probably there is a temporary connection loss.");
             /* Drain write buffer */
             written = size;
+        } else if (errno == EINVAL && t->last_read_size == 0) {
+            /* Likely write_link_mtu is still wrong, retry after next successful read */
+            pa_log_debug("got write EINVAL, next successful read should fix MTU");
+            /* Drain write buffer */
+            written = size;
         } else {
             pa_log_error("Failed to write data to socket: %s", pa_cstrerror(errno));
             /* Report error from write call */
diff --git a/src/modules/bluetooth/bluez5-util.h b/src/modules/bluetooth/bluez5-util.h
index 59e0a1cde..8eb91c1c5 100644
--- a/src/modules/bluetooth/bluez5-util.h
+++ b/src/modules/bluetooth/bluez5-util.h
@@ -103,6 +103,7 @@ struct pa_bluetooth_transport {
 
     const pa_a2dp_codec *bt_codec;
     int stream_write_type;
+    size_t last_read_size;
 
     pa_volume_t source_volume;
     pa_volume_t sink_volume;
diff --git a/src/modules/bluetooth/module-bluez5-device.c b/src/modules/bluetooth/module-bluez5-device.c
index e0430dea8..94da20688 100644
--- a/src/modules/bluetooth/module-bluez5-device.c
+++ b/src/modules/bluetooth/module-bluez5-device.c
@@ -413,6 +413,9 @@ static ssize_t bt_transport_read(pa_bluetooth_transport *t, int fd, void *buffer
 
         pa_assert((size_t) received <= size);
 
+        /* allow write side to find out size of last read packet */
+        t->last_read_size = received;
+
         if (p_timestamp) {
             /* TODO: get timestamp from rtp */