1 files changed, 3 insertions, 1 deletions
diff --git a/include/llvm/MC/MCAtom.h b/include/llvm/MC/MCAtom.h
index 686f8e1158..4758588ac3 100644
--- a/include/llvm/MC/MCAtom.h
+++ b/include/llvm/MC/MCAtom.h
@@ -188,7 +188,9 @@ private:
   friend class MCModule;
   // Private constructor - only callable by MCModule
   MCDataAtom(MCModule *P, uint64_t Begin, uint64_t End)
-    : MCAtom(DataAtom, P, Begin, End), Data(End - Begin) {}
+    : MCAtom(DataAtom, P, Begin, End) {
+    Data.reserve(End + 1 - Begin);
+  }
 };
 
 }