diff --git a/ELF/SyntheticSections.cpp b/ELF/SyntheticSections.cpp
index f924756..650bd6c 100644
--- a/ELF/SyntheticSections.cpp
+++ b/ELF/SyntheticSections.cpp
@@ -628,19 +628,19 @@
 }
 
 void GotSection::addConstant(const Relocation &r) { relocations.push_back(r); }
-void GotSection::addEntry(Symbol &sym) {
+void GotSection::addEntry(const Symbol &sym) {
   assert(sym.auxIdx == symAux.size() - 1);
   symAux.back().gotIdx = numEntries++;
 }
 
-bool GotSection::addTlsDescEntry(Symbol &sym) {
+bool GotSection::addTlsDescEntry(const Symbol &sym) {
   assert(sym.auxIdx == symAux.size() - 1);
   symAux.back().tlsDescIdx = numEntries;
   numEntries += 2;
   return true;
 }
 
-bool GotSection::addDynTlsEntry(Symbol &sym) {
+bool GotSection::addDynTlsEntry(const Symbol &sym) {
   assert(sym.auxIdx == symAux.size() - 1);
   symAux.back().tlsGdIdx = numEntries;
   // Global Dynamic TLS entries take two GOT slots.
diff --git a/ELF/SyntheticSections.h b/ELF/SyntheticSections.h
index fa21b80..02a669b 100644
--- a/ELF/SyntheticSections.h
+++ b/ELF/SyntheticSections.h
@@ -106,9 +106,9 @@
   void writeTo(uint8_t *buf) override;
 
   void addConstant(const Relocation &r);
-  void addEntry(Symbol &sym);
-  bool addTlsDescEntry(Symbol &sym);
-  bool addDynTlsEntry(Symbol &sym);
+  void addEntry(const Symbol &sym);
+  bool addTlsDescEntry(const Symbol &sym);
+  bool addDynTlsEntry(const Symbol &sym);
   bool addTlsIndex();
   uint32_t getTlsDescOffset(const Symbol &sym) const;
   uint64_t getTlsDescAddr(const Symbol &sym) const;