diff --git a/src/frontend/arm_types.cpp b/src/frontend/arm_types.cpp
index 3fe4813f..7e856aa2 100644
--- a/src/frontend/arm_types.cpp
+++ b/src/frontend/arm_types.cpp
@@ -24,6 +24,16 @@ const char* RegToString(Reg reg) {
     return reg_strs.at(static_cast<size_t>(reg));
 }
 
+const char* ExtRegToString(ExtReg reg) {
+    constexpr std::array<const char*, 64> reg_strs = {
+        "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15",
+        "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",
+        "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15",
+        "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23", "d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31",
+    };
+    return reg_strs.at(static_cast<size_t>(reg));
+}
+
 std::string RegListToString(RegList reg_list) {
     std::string ret = "";
     bool first_reg = true;
diff --git a/src/frontend/arm_types.h b/src/frontend/arm_types.h
index b5c6da69..159a4ad9 100644
--- a/src/frontend/arm_types.h
+++ b/src/frontend/arm_types.h
@@ -121,6 +121,7 @@ struct LocationDescriptorHash {
 
 const char* CondToString(Cond cond, bool explicit_al = false);
 const char* RegToString(Reg reg);
+const char* ExtRegToString(ExtReg reg);
 std::string RegListToString(RegList reg_list);
 
 inline Reg operator+(Reg reg, int number) {
diff --git a/src/frontend/ir/ir.cpp b/src/frontend/ir/ir.cpp
index ae62f770..94ac140c 100644
--- a/src/frontend/ir/ir.cpp
+++ b/src/frontend/ir/ir.cpp
@@ -219,6 +219,8 @@ std::string DumpBlock(const IR::Block& block) {
                 return Common::StringFromFormat("#%#x", arg.GetU32());
             case Type::RegRef:
                 return Arm::RegToString(arg.GetRegRef());
+            case Type::ExtRegRef:
+                return Arm::ExtRegToString(arg.GetExtRegRef());
             default:
                 return "<unknown immediate type>";
         }