diff --git a/src/designer/makefile.am b/src/designer/makefile.am
index ea3a67c..e9b8671 100644
--- a/src/designer/makefile.am
+++ b/src/designer/makefile.am
@@ -79,7 +79,16 @@ ${QMAKE_TARGET}: ${QMAKE_MAKEFILE} ${ALL_SRC}
 
 install-data-local: ${QMAKE_MAKEFILE}
 	${mkinstalldirs} ${DESTDIR}${QT_INSTALL_PLUGINS}
-	${INSTALL} ${QMAKE_TARGET:%=lib%*} ${DESTDIR}${QT_INSTALL_PLUGINS}
+	for file in ${QMAKE_TARGET:%=lib%*}; do \
+	  if test -e $file; then \
+	    ${INSTALL} $file ${DESTDIR}${QT_INSTALL_PLUGINS}; \
+	  fi; \
+	done
+	for file in release/${QMAKE_TARGET:%=lib%*}; do \
+	  if test -e $file; then \
+	    ${INSTALL} $file ${DESTDIR}${QT_INSTALL_PLUGINS}; \
+	  fi; \
+	done
 
 uninstall-local:
 	-rm -r ${QMAKE_TARGET:%=${DESTDIR}${QT_INSTALL_PLUGINS}/lib%*}