diff --git a/lib/checkstring.cpp b/lib/checkstring.cpp
index 090dbeb33..f92a03cec 100644
--- a/lib/checkstring.cpp
+++ b/lib/checkstring.cpp
@@ -50,7 +50,7 @@ void CheckString::stringLiteralWrite()
 void CheckString::stringLiteralWriteError(const Token *tok)
 {
     reportError(tok, Severity::error, "stringLiteralWrite",
-                "Modifying string literal directly or indirectly is UB");
+                "Modifying string literal directly or indirectly is undefined behaviour");
 }
 
 //---------------------------------------------------------------------------
diff --git a/test/teststring.cpp b/test/teststring.cpp
index 80d2dd1a9..705f97400 100644
--- a/test/teststring.cpp
+++ b/test/teststring.cpp
@@ -102,13 +102,13 @@ private:
               "  char *abc = \"abc\";\n"
               "  abc[0] = 'a';\n"
               "}");
-        ASSERT_EQUALS("[test.cpp:3]: (error) Modifying string literal directly or indirectly is UB\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (error) Modifying string literal directly or indirectly is undefined behaviour\n", errout.str());
 
         check("void f() {\n"
               "  char *abc = \"abc\";\n"
               "  *abc = 'a';\n"
               "}");
-        ASSERT_EQUALS("[test.cpp:3]: (error) Modifying string literal directly or indirectly is UB\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (error) Modifying string literal directly or indirectly is undefined behaviour\n", errout.str());
 
         check("void f() {\n"
               "  char *abc = \"abc\";\n"