diff --git a/lib/Target/Mips/MipsTargetStreamer.h b/lib/Target/Mips/MipsTargetStreamer.h
index 1839082aecf..7778f40be60 100644
--- a/lib/Target/Mips/MipsTargetStreamer.h
+++ b/lib/Target/Mips/MipsTargetStreamer.h
@@ -16,7 +16,7 @@
 
 namespace llvm {
 
-class MipsABIFlagsSection;
+struct MipsABIFlagsSection;
 
 using Val_GNU_MIPS_ABI = MipsABIFlagsSection::Val_GNU_MIPS_ABI;