diff --git a/llvm/include/llvm/ADT/SmallVector.h b/llvm/include/llvm/ADT/SmallVector.h
index bd3e887e36bce..cda7c1de3db2a 100644
--- a/llvm/include/llvm/ADT/SmallVector.h
+++ b/llvm/include/llvm/ADT/SmallVector.h
@@ -66,13 +66,13 @@ template <class Size_T> class SmallVectorBase {
   /// This is a helper for \a grow() that's out of line to reduce code
   /// duplication.  This function will report a fatal error if it can't grow at
   /// least to \p MinSize.
-  void *mallocForGrow(void *FirstEl, size_t MinSize, size_t TSize,
-                      size_t &NewCapacity);
+  LLVM_ABI void *mallocForGrow(void *FirstEl, size_t MinSize, size_t TSize,
+                               size_t &NewCapacity);
 
   /// This is an implementation of the grow() method which only works
   /// on POD-like data types and is out of line to reduce code duplication.
   /// This function will report a fatal error if it cannot increase capacity.
-  void grow_pod(void *FirstEl, size_t MinSize, size_t TSize);
+  LLVM_ABI void grow_pod(void *FirstEl, size_t MinSize, size_t TSize);
 
 public:
   size_t size() const { return Size; }