diff --git a/compiler/arm/narmmat.pas b/compiler/arm/narmmat.pas
index 295377392d..ed3ddd48d8 100644
--- a/compiler/arm/narmmat.pas
+++ b/compiler/arm/narmmat.pas
@@ -86,7 +86,8 @@ implementation
                   location_copy(location,left.location);
                   inverse_flags(location.resflags);
                 end;
-              LOC_REGISTER,LOC_CREGISTER,LOC_REFERENCE,LOC_CREFERENCE :
+              LOC_REGISTER,LOC_CREGISTER,LOC_REFERENCE,LOC_CREFERENCE,
+              LOC_SUBSETREG,LOC_CSUBSETREG,LOC_SUBSETREF,LOC_CSUBSETREF :
                 begin
                   location_force_reg(current_asmdata.CurrAsmList,left.location,def_cgsize(left.resultdef),true);
                   current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_CMP,left.location.register,0));