--- a/configure.ac-old	2015-06-16 18:09:30.351631561 +0200
+++ b/configure.ac	2015-06-16 18:09:46.000000000 +0200
@@ -7604,7 +7645,7 @@
 dnl ===================================================================
 dnl Check for system libwps
 dnl ===================================================================
-libo_CHECK_SYSTEM_MODULE([libwps],[WPS],[libwps-0.3])
+libo_CHECK_SYSTEM_MODULE([libwps],[WPS],[libwps-0.4])
 
 dnl ===================================================================
 dnl Check for system libwpg
--- a/writerperfect/source/writer/MSWorksImportFilter.cxx-old	2015-06-16 18:16:01.703195434 +0200
+++ b/writerperfect/source/writer/MSWorksImportFilter.cxx	2015-06-16 18:16:43.059571839 +0200
@@ -39,7 +39,9 @@
 bool MSWorksImportFilter::doDetectFormat(librevenge::RVNGInputStream &rInput, OUString &rTypeName)
 {
     libwps::WPSKind kind = libwps::WPS_TEXT;
-    const libwps::WPSConfidence confidence = libwps::WPSDocument::isFileFormatSupported(&rInput, kind);
+    libwps::WPSCreator creator;
+    bool needsEncoding = false;
+    const libwps::WPSConfidence confidence = libwps::WPSDocument::isFileFormatSupported(&rInput, kind, creator, needsEncoding);
 
     if ((kind == libwps::WPS_TEXT) && (confidence == libwps::WPS_CONFIDENCE_EXCELLENT))
     {
--- a/writerperfect/source/calc/MSWorksCalcImportFilter.cxx-old	2015-06-16 18:14:12.910205066 +0200
+++ b/writerperfect/source/calc/MSWorksCalcImportFilter.cxx	2015-06-16 18:14:49.378537077 +0200
@@ -32,7 +32,9 @@
 bool MSWorksCalcImportFilter::doDetectFormat(librevenge::RVNGInputStream &rInput, OUString &rTypeName)
 {
     libwps::WPSKind kind = libwps::WPS_TEXT;
-    const libwps::WPSConfidence confidence = libwps::WPSDocument::isFileFormatSupported(&rInput, kind);
+    libwps::WPSCreator creator;
+    bool needsEncoding = false;
+    const libwps::WPSConfidence confidence = libwps::WPSDocument::isFileFormatSupported(&rInput, kind, creator, needsEncoding);
 
     if ((kind == libwps::WPS_SPREADSHEET || kind == libwps::WPS_DATABASE) && (confidence == libwps::WPS_CONFIDENCE_EXCELLENT))
     {