diff --git a/lib/Analysis/IPA/CallGraphSCCPass.cpp b/lib/Analysis/IPA/CallGraphSCCPass.cpp
index 786b720..e28a2a5 100644
--- a/lib/Analysis/IPA/CallGraphSCCPass.cpp
+++ b/lib/Analysis/IPA/CallGraphSCCPass.cpp
@@ -31,7 +31,7 @@
 
 public:
   static char ID;
-  CGPassManager(int Depth) 
+  explicit CGPassManager(int Depth) 
     : ModulePass((intptr_t)&ID), PMDataManager(Depth) { }
 
   /// run - Execute all of the passes scheduled for execution.  Keep track of
diff --git a/lib/Analysis/ProfileInfoLoaderPass.cpp b/lib/Analysis/ProfileInfoLoaderPass.cpp
index e749375..9685943 100644
--- a/lib/Analysis/ProfileInfoLoaderPass.cpp
+++ b/lib/Analysis/ProfileInfoLoaderPass.cpp
@@ -33,7 +33,7 @@
     std::string Filename;
   public:
     static char ID; // Class identification, replacement for typeinfo
-    LoaderPass(const std::string &filename = "")
+    explicit LoaderPass(const std::string &filename = "")
       : ModulePass((intptr_t)&ID), Filename(filename) {
       if (filename.empty()) Filename = ProfileInfoFilename;
     }