diff --git a/lib/MC/MCMachOStreamer.cpp b/lib/MC/MCMachOStreamer.cpp
index aa35815dd19..50ab1f86443 100644
--- a/lib/MC/MCMachOStreamer.cpp
+++ b/lib/MC/MCMachOStreamer.cpp
@@ -156,8 +156,6 @@ void MCMachOStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
 }
 
 void MCMachOStreamer::EmitThumbFunc(MCSymbol *Symbol) {
-  // FIXME: Flag the function ISA as thumb with DW_AT_APPLE_isa.
-
   // Remember that the function is a thumb function. Fixup and relocation
   // values will need adjusted.
   getAssembler().setIsThumbFunc(Symbol);