diff --git a/src/ARMInterpreter_Branch.cpp b/src/ARMInterpreter_Branch.cpp
index 35bbbc52..01a58092 100644
--- a/src/ARMInterpreter_Branch.cpp
+++ b/src/ARMInterpreter_Branch.cpp
@@ -115,6 +115,9 @@ void T_BL_LONG_1(ARM* cpu)
 
 void T_BL_LONG_2(ARM* cpu)
 {
+    if ((cpu->CurInstr & 0x1801) == 0x0801) // "BLX" with bit 0 set is an unvalid instruction.
+        return T_UNK(cpu); // TODO: Check ARM7 for exceptions
+    
     cpu->AddCycles_C();
     s32 offset = (cpu->CurInstr & 0x7FF) << 1;
     u32 pc = cpu->R[14] + offset;