diff --git a/llvm/include/llvm/MC/MCAsmBackend.h b/llvm/include/llvm/MC/MCAsmBackend.h
index 710e84b05ee5..1c9feef10a33 100644
--- a/llvm/include/llvm/MC/MCAsmBackend.h
+++ b/llvm/include/llvm/MC/MCAsmBackend.h
@@ -223,11 +223,6 @@ public:
     return 0;
   }
 
-  /// Check whether a given symbol has been flagged with MICROMIPS flag.
-  virtual bool isMicroMips(const MCSymbol *Sym) const {
-    return false;
-  }
-
   bool isDarwinCanonicalPersonality(const MCSymbol *Sym) const;
 };
 
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
index 5f7974ab6cae..0c295997ab52 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
@@ -602,14 +602,6 @@ bool MipsAsmBackend::shouldForceRelocation(const MCAssembler &Asm,
   }
 }
 
-bool MipsAsmBackend::isMicroMips(const MCSymbol *Sym) const {
-  if (const auto *ElfSym = dyn_cast<const MCSymbolELF>(Sym)) {
-    if (ElfSym->getOther() & ELF::STO_MIPS_MICROMIPS)
-      return true;
-  }
-  return false;
-}
-
 namespace {
 
 class WindowsMipsAsmBackend : public MipsAsmBackend {
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
index 9752615422b6..1e8504aaf2aa 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
@@ -54,8 +54,6 @@ public:
   bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
                              const MCValue &Target,
                              const MCSubtargetInfo *STI) override;
-
-  bool isMicroMips(const MCSymbol *Sym) const override;
 }; // class MipsAsmBackend
 
 } // namespace