diff --git a/src/plugins/coreplugin/id.cpp b/src/plugins/coreplugin/id.cpp
index a394b3c6180..2f7a8510c3c 100644
--- a/src/plugins/coreplugin/id.cpp
+++ b/src/plugins/coreplugin/id.cpp
@@ -106,7 +106,7 @@ static int theId(const char *str)
         if (lastUid == 0)
             stringFromId.append(QByteArray());
         res = ++lastUid;
-        sh.str = strdup(sh.str);
+        sh.str = qstrdup(sh.str);
         idFromString[sh] = res;
         stringFromId.append(QByteArray::fromRawData(sh.str, sh.n));
     }