diff --git a/src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfigurations.cpp b/src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfigurations.cpp
index aea2af9e00a36479fbb9730901b6699d17a4dc1e..9caad09775c6c49e4d15313978948378e552ddc9 100644
--- a/src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfigurations.cpp
+++ b/src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfigurations.cpp
@@ -155,7 +155,7 @@ private:
         int port = 0;
         do {
             const char next = nextChar();
-            if (!isdigit(next))
+            if (!std::isdigit(next))
                 break;
             port = 10*port + next - '0';
             ++m_pos;