diff --git a/examples/termcap.cpp b/examples/termcap.cpp
index 09b5cb07..04c5ad22 100644
--- a/examples/termcap.cpp
+++ b/examples/termcap.cpp
@@ -225,7 +225,7 @@ void debug (FApplication& TermApp)
   if ( ab_s.isEmpty() )
     tcapString ("|         The answerback String", ab_s);
 
-  if ( ab_s.isEmpty() )
+  if ( sec_da.isEmpty() )
     tcapString ("|              The SecDA String", sec_da);
 
   std::cout << "`------------------- debug -------------------\r\n";
diff --git a/include/final/fstring.h b/include/final/fstring.h
index cded68c5..ec5106be 100644
--- a/include/final/fstring.h
+++ b/include/final/fstring.h
@@ -226,7 +226,7 @@ class FString
     wchar_t  front() const;
     wchar_t  back()  const;
 
-    FString& sprintf (const FString&, ...);
+    FString& sprintf (const FString, ...);
     FString& sprintf (const wchar_t[], ...);
     FString& sprintf (const char[], ...)
 #if defined(__clang__)
diff --git a/src/fstring.cpp b/src/fstring.cpp
index a4883aa5..5d6d2fb5 100644
--- a/src/fstring.cpp
+++ b/src/fstring.cpp
@@ -735,7 +735,7 @@ uInt FString::getUTF8length() const
 }
 
 //----------------------------------------------------------------------
-FString& FString::sprintf (const FString& format, ...)
+FString& FString::sprintf (const FString format, ...)
 {
   static const int BUFSIZE = 4096;
   wchar_t buffer[BUFSIZE];