diff --git a/ax_check_qt.m4 b/ax_check_qt.m4
index 673330f..9e99aa2 100644
--- a/ax_check_qt.m4
+++ b/ax_check_qt.m4
@@ -78,10 +78,4 @@ AC_DEFUN([AX_CXX_CHECK_QT], [
   AM_CONDITIONAL(HAVE_$1, test $HAVE_$1 -eq 1)
   AC_SUBST(AM_CPPFLAGS)
   AC_SUBST(AM_CXXFLAGS)
-  AX_CHECK_COMPILE_FLAG(-fPIC, [AM_CXXFLAGS+=" -fPIC"])
-  AX_CHECK_COMPILE_FLAG(-DPIC, [AM_CXXFLAGS+=" -DPIC"])
-  AX_CHECK_COMPILE_FLAG(-fPIE, [AM_CXXFLAGS+=" -fPIE"])
-  AX_CHECK_LINK_FLAG(-fPIC, [LDFLAGS+=" -fPIC"])
-  AX_CHECK_LINK_FLAG(-DPIC, [LDFLAGS+=" -DPIC"])
-  AX_CHECK_LINK_FLAG(-fPIE, [LDFLAGS+=" -fPIE"])
 ])