diff --git a/src/term.c b/src/term.c
index e00531d4af..8b557ae992 100644
--- a/src/term.c
+++ b/src/term.c
@@ -8056,6 +8056,11 @@ term_set_sync_output(int flags)
     {
 	if (sync_output_state == 0 || --sync_output_state > 0)
 	    return;
+	// Flush the output buffer before ending the sync batch so that
+	// all drawing output is sent to the terminal within the
+	// BSU..ESU window.  Without this, the drawing data remaining in
+	// out_buf would be sent after ESU, outside the sync batch.
+	out_flush();
 	str = T_ESU;
     }
     else
diff --git a/src/version.c b/src/version.c
index 762553cd58..37ef83b978 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    150,
 /**/
     149,
 /**/