diff --git qucs/configure qucs/configure
index 647a72e..2e60bd1 100755
--- qucs/configure
+++ qucs/configure
@@ -18566,7 +18566,7 @@ fi
                         with_qt=no
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Qt OS X framework" >&5
 $as_echo_n "checking for Qt OS X framework... " >&6; }
-    paths="$QTDIR/lib ${prefix}/Library/Frameworks /Library/Frameworks /opt/local/lib /usr/local/lib"
+    paths="$QTDIR/lib ${prefix}/libexec/qt4/Library/Frameworks /Library/Frameworks /opt/local/lib /usr/local/lib"
     for path in $paths; do
       if test -f "$path/QtGui.framework/Headers/QApplication"; then
         with_qt=yes
@@ -18589,6 +18589,7 @@ $as_echo "found in $path" >&6; }
       CPPFLAGS="$CPPFLAGS -I$path/QtScript.framework/Headers"
       CPPFLAGS="$CPPFLAGS -I$path/QtTest.framework/Headers"
       CPPFLAGS="$CPPFLAGS -I$path/Qt3Support.framework/Headers"
+      CPPFLAGS="$CPPFLAGS -I$prefix/libexec/qt4/include"
       QT_LDFLAGS="$QT_LDFLAGS -F$path"
     else
       as_fn_error $? "not found" "$LINENO" 5