diff --git a/mold.h b/mold.h
index 13451274..55de956c 100644
--- a/mold.h
+++ b/mold.h
@@ -406,6 +406,7 @@ public:
     this->name = ".rela.plt";
     shdr.sh_flags = llvm::ELF::SHF_ALLOC;
     shdr.sh_type = llvm::ELF::SHT_RELA;
+    shdr.sh_entsize = sizeof(ELF64LE::Rela);
     shdr.sh_addralign = 8;
   }