diff --git a/src/asm.rs b/src/asm.rs
index b4213da6e05..8a74c4c07e0 100644
--- a/src/asm.rs
+++ b/src/asm.rs
@@ -560,6 +560,7 @@ fn reg_to_gcc(reg: InlineAsmRegOrRegClass) -> ConstraintOrRegister {
             InlineAsmRegClass::Hexagon(HexagonInlineAsmRegClass::reg) => unimplemented!(),
             InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg) => unimplemented!(),
             InlineAsmRegClass::Mips(MipsInlineAsmRegClass::freg) => unimplemented!(),
+            InlineAsmRegClass::Msp430(_) => unimplemented!(),
             InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg16) => unimplemented!(),
             InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg32) => unimplemented!(),
             InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg64) => unimplemented!(),
@@ -622,6 +623,7 @@ fn dummy_output_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, reg: InlineAsmRegCl
         InlineAsmRegClass::Hexagon(HexagonInlineAsmRegClass::reg) => cx.type_i32(),
         InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg) => cx.type_i32(),
         InlineAsmRegClass::Mips(MipsInlineAsmRegClass::freg) => cx.type_f32(),
+        InlineAsmRegClass::Msp430(_) => unimplemented!(),
         InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg16) => cx.type_i16(),
         InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg32) => cx.type_i32(),
         InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg64) => cx.type_i64(),
@@ -729,6 +731,7 @@ fn modifier_to_gcc(arch: InlineAsmArch, reg: InlineAsmRegClass, modifier: Option
         InlineAsmRegClass::Bpf(_) => unimplemented!(),
         InlineAsmRegClass::Hexagon(_) => unimplemented!(),
         InlineAsmRegClass::Mips(_) => unimplemented!(),
+        InlineAsmRegClass::Msp430(_) => unimplemented!(),
         InlineAsmRegClass::Nvptx(_) => unimplemented!(),
         InlineAsmRegClass::PowerPC(_) => unimplemented!(),
         InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg)