diff --git a/src/frontend/A32/decoder/thumb32.inc b/src/frontend/A32/decoder/thumb32.inc
index 52e33e86..bd09a041 100644
--- a/src/frontend/A32/decoder/thumb32.inc
+++ b/src/frontend/A32/decoder/thumb32.inc
@@ -45,7 +45,7 @@ INST(thumb32_ADC_reg,        "ADC (reg)",                "11101011010Snnnn0vvvdd
 INST(thumb32_SBC_reg,        "SBC (reg)",                "11101011011Snnnn0vvvddddvvttmmmm")
 INST(thumb32_CMP_reg,        "CMP (reg)",                "111010111011nnnn0vvv1111vvttmmmm")
 INST(thumb32_SUB_reg,        "SUB (reg)",                "11101011101Snnnn0vvvddddvvttmmmm")
-//INST(thumb32_RSB_reg,        "RSB (reg)",                "11101011110---------------------")
+INST(thumb32_RSB_reg,        "RSB (reg)",                "11101011110Snnnn0vvvddddvvttmmmm")
 
 // Data Processing (Modified Immediate)
 INST(thumb32_TST_imm,        "TST (imm)",                "11110v000001nnnn0vvv1111vvvvvvvv")
diff --git a/src/frontend/A32/translate/impl/thumb32_data_processing_shifted_register.cpp b/src/frontend/A32/translate/impl/thumb32_data_processing_shifted_register.cpp
index 4655c95a..cfb33419 100644
--- a/src/frontend/A32/translate/impl/thumb32_data_processing_shifted_register.cpp
+++ b/src/frontend/A32/translate/impl/thumb32_data_processing_shifted_register.cpp
@@ -272,4 +272,21 @@ bool ThumbTranslatorVisitor::thumb32_SUB_reg(bool S, Reg n, Imm<3> imm3, Reg d,
     return true;
 }
 
+bool ThumbTranslatorVisitor::thumb32_RSB_reg(bool S, Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, ShiftType type, Reg m) {
+    if (d == Reg::PC || n == Reg::PC || m == Reg::PC) {
+        return UnpredictableInstruction();
+    }
+
+    const auto shifted = EmitImmShift(ir.GetRegister(m), type, imm3, imm2, ir.GetCFlag());
+    const auto result = ir.SubWithCarry(shifted.result, ir.GetRegister(n), ir.Imm1(1));
+    ir.SetRegister(d, result.result);
+    if (S) {
+        ir.SetNFlag(ir.MostSignificantBit(result.result));
+        ir.SetZFlag(ir.IsZero(result.result));
+        ir.SetCFlag(result.carry);
+        ir.SetVFlag(result.overflow);
+    }
+    return true;
+}
+
 } // namespace Dynarmic::A32
diff --git a/src/frontend/A32/translate/impl/translate_thumb.h b/src/frontend/A32/translate/impl/translate_thumb.h
index 6471f3df..05ff0fdb 100644
--- a/src/frontend/A32/translate/impl/translate_thumb.h
+++ b/src/frontend/A32/translate/impl/translate_thumb.h
@@ -188,6 +188,7 @@ struct ThumbTranslatorVisitor final {
     bool thumb32_SBC_reg(bool S, Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, ShiftType type, Reg m);
     bool thumb32_CMP_reg(Reg n, Imm<3> imm3, Imm<2> imm2, ShiftType type, Reg m);
     bool thumb32_SUB_reg(bool S, Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, ShiftType type, Reg m);
+    bool thumb32_RSB_reg(bool S, Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, ShiftType type, Reg m);
 
     // thumb32 data processing (modified immediate) instructions
     bool thumb32_TST_imm(Imm<1> i, Reg n, Imm<3> imm3, Imm<8> imm8);