diff --git a/llvm/include/llvm/CodeGen/MachineFrameInfo.h b/llvm/include/llvm/CodeGen/MachineFrameInfo.h
index 9c5e1b1eac52..3e24d2722c0e 100644
--- a/llvm/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineFrameInfo.h
@@ -36,7 +36,7 @@ class CalleeSavedInfo {
   int FrameIdx;
   
 public:
-  CalleeSavedInfo(unsigned R, int FI = 0)
+  explicit CalleeSavedInfo(unsigned R, int FI = 0)
   : Reg(R), FrameIdx(FI) {}
   
   // Accessors.
diff --git a/llvm/include/llvm/CodeGen/MachineJumpTableInfo.h b/llvm/include/llvm/CodeGen/MachineJumpTableInfo.h
index 1b6ab2cd4cbc..62643497655a 100644
--- a/llvm/include/llvm/CodeGen/MachineJumpTableInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineJumpTableInfo.h
@@ -74,7 +74,7 @@ private:
   JTEntryKind EntryKind;
   std::vector<MachineJumpTableEntry> JumpTables;
 public:
-  MachineJumpTableInfo(JTEntryKind Kind): EntryKind(Kind) {}
+  explicit MachineJumpTableInfo(JTEntryKind Kind): EntryKind(Kind) {}
     
   JTEntryKind getEntryKind() const { return EntryKind; }