diff --git a/include/llvm/SymbolTable.h b/include/llvm/SymbolTable.h
index 5083243c362..52a2c29ea78 100644
--- a/include/llvm/SymbolTable.h
+++ b/include/llvm/SymbolTable.h
@@ -16,6 +16,7 @@
 #define LLVM_SYMBOL_TABLE_H
 
 #include "llvm/Value.h"
+#include "llvm/Support/DataTypes.h"
 #include <map>
 
 namespace llvm {
@@ -292,7 +293,7 @@ private:
 
   /// This value is used to retain the last unique value used
   /// by getUniqueName to generate unique names.
-  mutable uint64_t LastUnique;
+  mutable uint32_t LastUnique;
 
 /// @}
 
diff --git a/include/llvm/TypeSymbolTable.h b/include/llvm/TypeSymbolTable.h
index 8a494562d37..c9f8d3107b5 100644
--- a/include/llvm/TypeSymbolTable.h
+++ b/include/llvm/TypeSymbolTable.h
@@ -138,7 +138,7 @@ private:
 /// @{
 private:
   TypeMap tmap; ///< This is the mapping of names to types.
-  mutable uint64_t LastUnique; ///< Counter for tracking unique names
+  mutable uint32_t LastUnique; ///< Counter for tracking unique names
 
 /// @}
 
diff --git a/include/llvm/ValueSymbolTable.h b/include/llvm/ValueSymbolTable.h
index 34fa28bd5a7..515e054d5c5 100644
--- a/include/llvm/ValueSymbolTable.h
+++ b/include/llvm/ValueSymbolTable.h
@@ -127,7 +127,7 @@ public:
 /// @{
 private:
   ValueMap vmap;                    ///< The map that holds the symbol table.
-  mutable uint64_t LastUnique; ///< Counter for tracking unique names
+  mutable uint32_t LastUnique; ///< Counter for tracking unique names
 
 /// @}