diff --git a/lib/checkstring.cpp b/lib/checkstring.cpp
index 5afd02723..3e80d3048 100644
--- a/lib/checkstring.cpp
+++ b/lib/checkstring.cpp
@@ -428,10 +428,19 @@ void CheckString::sprintfOverlappingData()
 
             const int formatString = Token::simpleMatch(tok, "sprintf") ? 1 : 2;
             for (unsigned int argnr = formatString + 1; argnr < args.size(); ++argnr) {
+                const Token *dest = args[0];
+                if (dest->isCast())
+                    dest = dest->astOperand2() ? dest->astOperand2() : dest->astOperand1();
+                const Token *arg = args[argnr];
+                if (!arg->valueType() || arg->valueType()->pointer != 1)
+                    continue;
+                if (arg->isCast())
+                    arg = arg->astOperand2() ? arg->astOperand2() : arg->astOperand1();
+
                 const bool same = isSameExpression(mTokenizer->isCPP(),
                                                    false,
-                                                   args[0],
-                                                   args[argnr],
+                                                   dest,
+                                                   arg,
                                                    mSettings->library,
                                                    true,
                                                    false);
diff --git a/lib/checkstring.h b/lib/checkstring.h
index b432c8625..5fb7a4a03 100644
--- a/lib/checkstring.h
+++ b/lib/checkstring.h
@@ -59,6 +59,7 @@ public:
         checkString.stringLiteralWrite();
         checkString.overlappingStrcmp();
         checkString.checkIncorrectStringCompare();
+        checkString.sprintfOverlappingData();
     }
 
     /** @brief Run checks against the simplified token list */
@@ -67,7 +68,6 @@ public:
 
         // Checks
         checkString.checkAlwaysTrueOrFalseStringCompare();
-        checkString.sprintfOverlappingData();
     }
 
     /** @brief undefined behaviour, writing string literal */