diff --git a/lld/ELF/InputSection.cpp b/lld/ELF/InputSection.cpp
index 9109ced45e8d62599e62d88f8181833a8f8b4f38..7b1342eca5331822bd52e5d5c9a5ffbb3ba68097 100644
--- a/lld/ELF/InputSection.cpp
+++ b/lld/ELF/InputSection.cpp
@@ -925,12 +925,6 @@ void MergeInputSection::splitIntoPieces() {
       getSectionPiece(Off)->Live = true;
 }
 
-// Do binary search to get a section piece at a given input offset.
-SectionPiece *MergeInputSection::getSectionPiece(uint64_t Offset) {
-  auto *This = static_cast<const MergeInputSection *>(this);
-  return const_cast<SectionPiece *>(This->getSectionPiece(Offset));
-}
-
 template <class It, class T, class Compare>
 static It fastUpperBound(It First, It Last, const T &Value, Compare Comp) {
   size_t Size = std::distance(First, Last);
@@ -944,7 +938,8 @@ static It fastUpperBound(It First, It Last, const T &Value, Compare Comp) {
   return Comp(Value, *First) ? First : First + 1;
 }
 
-const SectionPiece *MergeInputSection::getSectionPiece(uint64_t Offset) const {
+// Do binary search to get a section piece at a given input offset.
+SectionPiece *MergeInputSection::getSectionPiece(uint64_t Offset) {
   if (Data.size() <= Offset)
     fatal(toString(this) + ": entry is past the end of the section");
 
diff --git a/lld/ELF/InputSection.h b/lld/ELF/InputSection.h
index ab6158018092e519be7f37fd719c79b84c399606..714439b2dbf5749af61a22e0ca1685654642f279 100644
--- a/lld/ELF/InputSection.h
+++ b/lld/ELF/InputSection.h
@@ -251,7 +251,9 @@ public:
 
   // Returns the SectionPiece at a given input section offset.
   SectionPiece *getSectionPiece(uint64_t Offset);
-  const SectionPiece *getSectionPiece(uint64_t Offset) const;
+  const SectionPiece *getSectionPiece(uint64_t Offset) const {
+    return const_cast<MergeInputSection *>(this)->getSectionPiece(Offset);
+  }
 
   SyntheticSection *getParent() const;