diff --git a/src/hotspot/cpu/aarch64/aarch64.ad b/src/hotspot/cpu/aarch64/aarch64.ad
index a82a1b396e0a6..1b8b9801f3c71 100644
--- a/src/hotspot/cpu/aarch64/aarch64.ad
+++ b/src/hotspot/cpu/aarch64/aarch64.ad
@@ -16230,7 +16230,7 @@ instruct partialSubtypeCheckConstSuper(iRegP_R4 sub, iRegP_R0 super_reg, immP su
   effect(KILL cr, TEMP tempR1, TEMP tempR2, TEMP tempR3, TEMP vtemp);
 
   ins_cost(700);  // smaller than the next version
-  format %{ "partialSubtypeCheck $result, $sub, super" %}
+  format %{ "partialSubtypeCheck $result, $sub, $super_reg, $super_con" %}
 
   ins_encode %{
     bool success = false;
diff --git a/src/hotspot/cpu/x86/x86_64.ad b/src/hotspot/cpu/x86/x86_64.ad
index 5d1c513b10f1a..f3ad721dfcb9d 100644
--- a/src/hotspot/cpu/x86/x86_64.ad
+++ b/src/hotspot/cpu/x86/x86_64.ad
@@ -12094,7 +12094,7 @@ instruct partialSubtypeCheckConstSuper(rsi_RegP sub, rax_RegP super_reg, immP su
   effect(KILL cr, TEMP temp1, TEMP temp2, TEMP temp3, TEMP temp4);
 
   ins_cost(700);  // smaller than the next version
-  format %{ "partialSubtypeCheck $result, $sub, super" %}
+  format %{ "partialSubtypeCheck $result, $sub, $super_reg, $super_con" %}
 
   ins_encode %{
     u1 super_klass_slot = ((Klass*)$super_con$$constant)->hash_slot();