diff --git a/m4/qt.m4 b/m4/qt.m4
index 62579d5..848c15e 100644
--- a/m4/qt.m4
+++ b/m4/qt.m4
@@ -24,8 +24,9 @@ AC_DEFUN([FIND_QT],
                     [have_qt5test_libs="no"])
 
   if ! test "$have_w32_system" = yes; then
+    GPGME_QT_CFLAGS="$GPGME_QT_CFLAGS -shared"
     if "$PKG_CONFIG" --variable qt_config Qt5Core | grep -q "reduce_relocations"; then
-      GPGME_QT_CFLAGS="$GPGME_QT_CFLAGS -fpic"
+      GPGME_QT_CFLAGS="$GPGME_QT_CFLAGS -fPIC"
     fi
   fi
   if test "$have_qt5_libs" = "yes"; then