diff --git a/uppsrc/Core/Inet.h b/uppsrc/Core/Inet.h
index abb811c9e..c4a62ac44 100644
--- a/uppsrc/Core/Inet.h
+++ b/uppsrc/Core/Inet.h
@@ -738,7 +738,7 @@ public:
 
 	dword  GetWaitEvents() const                        { return WAIT_READ|(!!out_queue.GetCount() * WAIT_WRITE); }
 	SOCKET GetSOCKET() const                            { return socket ? socket->GetSOCKET() : INVALID_SOCKET; }
-	String GetPeerAddr() const                          { return socket ? socket->GetPeerAddr() : ""; }
+	String GetPeerAddr() const                          { return socket ? socket->GetPeerAddr() : String(); }
 	void   AddTo(SocketWaitEvent& e)                    { e.Add(*socket, GetWaitEvents()); }
 
 	static void Trace(bool b = true);
diff --git a/uppsrc/Core/JSON.h b/uppsrc/Core/JSON.h
index 8b5642bcc..34014a917 100644
--- a/uppsrc/Core/JSON.h
+++ b/uppsrc/Core/JSON.h
@@ -1,9 +1,9 @@
 Value  ParseJSON(CParser& p);
 Value  ParseJSON(const char *s);
 
-inline String AsJSON(int i)             { return IsNull(i) ? "null" : AsString(i); }
-inline String AsJSON(double n)          { return IsNull(n) ? "null" : AsString(n); }
-inline String AsJSON(float f)           { return IsNull(f) ? "null" : AsString(f); }
+inline String AsJSON(int i)             { return IsNull(i) ? String("null") : AsString(i); }
+inline String AsJSON(double n)          { return IsNull(n) ? String("null") : AsString(n); }
+inline String AsJSON(float f)           { return IsNull(f) ? String("null") : AsString(f); }
 inline String AsJSON(bool b)            { return b ? "true" : "false"; }
 inline String AsJSON(const String& s)   { return AsCString(s, INT_MAX, NULL, ASCSTRING_JSON); }
 inline String AsJSON(const WString& s)  { return AsCString(s.ToString(), INT_MAX, NULL, ASCSTRING_JSON); }
diff --git a/uppsrc/ide/InstantSetup.cpp b/uppsrc/ide/InstantSetup.cpp
index 6a1df70a8..62a946ca0 100644
--- a/uppsrc/ide/InstantSetup.cpp
+++ b/uppsrc/ide/InstantSetup.cpp
@@ -359,7 +359,8 @@ void InstantSetup()
 
 				bm.GetAdd("BUILDER") = builder;
 				bmSet(bm, "COMPILER", "");
-				bmSet(bm, "COMMON_OPTIONS", x64 ? "/bigobj" : "/bigobj /D_ATL_XP_TARGETING");
+				bmSet(bm, "COMMON_OPTIONS", x64 ? "/bigobj -D_CRT_SECURE_NO_WARNINGS"
+				                                : "/bigobj /D_ATL_XP_TARGETING -D_CRT_SECURE_NO_WARNINGS");
 				bmSet(bm, "COMMON_CPP_OPTIONS", "");
 				bmSet(bm, "COMMON_C_OPTIONS", "");
 				bmSet(bm, "COMMON_FLAGS", "");
diff --git a/uppsrc/plugin/sqlite3/lib/sqlite3mc_amalgamation.c b/uppsrc/plugin/sqlite3/lib/sqlite3mc_amalgamation.c
index fcf894364..aa80f13dd 100644
--- a/uppsrc/plugin/sqlite3/lib/sqlite3mc_amalgamation.c
+++ b/uppsrc/plugin/sqlite3/lib/sqlite3mc_amalgamation.c
@@ -222489,7 +222489,7 @@ SQLITE_API sqlite3rbu *sqlite3rbu_vacuum(
 ){
   if( zTarget==0 ){ return rbuMisuseError(); }
   if( zState ){
-    int n = strlen(zState);
+    int n = (int)strlen(zState);
     if( n>=7 && 0==memcmp("-vactmp", &zState[n-7], 7) ){
       return rbuMisuseError();
     }