diff --git a/target/hppa/insns.decode b/target/hppa/insns.decode
index 6f0c3f6ea5..ba7731b517 100644
--- a/target/hppa/insns.decode
+++ b/target/hppa/insns.decode
@@ -381,6 +381,8 @@ bl              111010 ..... ..... 101 ........... n:1 .        &BL l=2 \
                 disp=%assemble_22
 b_gate          111010 ..... ..... 001 ........... .   .        @bl
 blr             111010 l:5   x:5   010 00000000000 n:1 0
+nopbts          111010 00000 00000 010 0---------1   0 1    # clrbts/popbts
+nopbts          111010 00000 ----- 010 00000000000   0 1    # pushbts/pushnom
 bv              111010 b:5   x:5   110 00000000000 n:1 0
 bve             111010 b:5   00000 110 10000000000 n:1 -        l=0
 bve             111010 b:5   00000 111 10000000000 n:1 -        l=2
diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index 897b44d7e3..91249d89ca 100644
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -3782,6 +3782,12 @@ static bool trans_bve(DisasContext *ctx, arg_bve *a)
 #endif
 }
 
+static bool trans_nopbts(DisasContext *ctx, arg_nopbts *a)
+{
+    /* All branch target stack instructions implement as nop. */
+    return ctx->is_pa20;
+}
+
 /*
  * Float class 0
  */