5 files changed, 6 insertions, 6 deletions
diff --git a/mailnews/base/src/nsMailDirProvider.h b/mailnews/base/src/nsMailDirProvider.h
index d12876d89..613551a79 100644
--- a/mailnews/base/src/nsMailDirProvider.h
+++ b/mailnews/base/src/nsMailDirProvider.h
@@ -29,7 +29,7 @@ private:
     NS_DECL_ISUPPORTS
     NS_DECL_NSISIMPLEENUMERATOR
 
-    AppendingEnumerator(nsISimpleEnumerator* aBase);
+    explicit AppendingEnumerator(nsISimpleEnumerator* aBase);
 
   private:
     ~AppendingEnumerator() {}
diff --git a/mailnews/base/src/nsMsgCopyService.h b/mailnews/base/src/nsMsgCopyService.h
index dfb9acc7a..8df9ccff5 100644
--- a/mailnews/base/src/nsMsgCopyService.h
+++ b/mailnews/base/src/nsMsgCopyService.h
@@ -29,7 +29,7 @@ class nsCopySource
 {
 public:
     nsCopySource();
-    nsCopySource(nsIMsgFolder* srcFolder);
+    explicit nsCopySource(nsIMsgFolder* srcFolder);
     ~nsCopySource();
     void AddMessage(nsIMsgDBHdr* aMsg);
 
diff --git a/mailnews/base/src/nsMsgDBView.h b/mailnews/base/src/nsMsgDBView.h
index 6dcbbea3b..feba5f14f 100644
--- a/mailnews/base/src/nsMsgDBView.h
+++ b/mailnews/base/src/nsMsgDBView.h
@@ -500,7 +500,7 @@ private:
     NS_DECL_NSISIMPLEENUMERATOR
 
     // nsMsgThreadEnumerator methods:
-    nsMsgViewHdrEnumerator(nsMsgDBView *view);
+    explicit nsMsgViewHdrEnumerator(nsMsgDBView *view);
 
     RefPtr<nsMsgDBView> m_view;
     nsMsgViewIndex m_curHdrIndex;
diff --git a/mailnews/base/src/nsMsgGroupThread.h b/mailnews/base/src/nsMsgGroupThread.h
index 3d1cb4fb4..076d7432a 100644
--- a/mailnews/base/src/nsMsgGroupThread.h
+++ b/mailnews/base/src/nsMsgGroupThread.h
@@ -21,7 +21,7 @@ public:
   friend class nsMsgGroupView;
 
   nsMsgGroupThread();
-  nsMsgGroupThread(nsIMsgDatabase *db);
+  explicit nsMsgGroupThread(nsIMsgDatabase *db);
 
   NS_DECL_NSIMSGTHREAD
   NS_DECL_ISUPPORTS
diff --git a/mailnews/base/src/nsMsgPrintEngine.cpp b/mailnews/base/src/nsMsgPrintEngine.cpp
index d2f8157ed..2a509f380 100644
--- a/mailnews/base/src/nsMsgPrintEngine.cpp
+++ b/mailnews/base/src/nsMsgPrintEngine.cpp
@@ -653,7 +653,7 @@ nsMsgPrintEngine::PrintMsgWindow()
 class nsPrintMsgWindowEvent : public mozilla::Runnable
 {
 public:
-  nsPrintMsgWindowEvent(nsMsgPrintEngine *mpe)
+  explicit nsPrintMsgWindowEvent(nsMsgPrintEngine *mpe)
     : mMsgPrintEngine(mpe)
   {}
 
@@ -672,7 +672,7 @@ private:
 class nsStartNextPrintOpEvent : public mozilla::Runnable
 {
 public:
-  nsStartNextPrintOpEvent(nsMsgPrintEngine *mpe)
+  explicit nsStartNextPrintOpEvent(nsMsgPrintEngine *mpe)
     : mMsgPrintEngine(mpe)
   {}