diff --git a/src/qtgui/advsearch_w.h b/src/qtgui/advsearch_w.h
index 8051fcc7..01912348 100644
--- a/src/qtgui/advsearch_w.h
+++ b/src/qtgui/advsearch_w.h
@@ -16,6 +16,7 @@
  */
 #ifndef _ADVSEARCH_W_H_INCLUDED_
 #define _ADVSEARCH_W_H_INCLUDED_
+#include "autoconfig.h"
 
 #include <vector>
 
diff --git a/src/qtgui/advshist.h b/src/qtgui/advshist.h
index 8234bec5..8c48fbf5 100644
--- a/src/qtgui/advshist.h
+++ b/src/qtgui/advshist.h
@@ -16,6 +16,7 @@
  */
 #ifndef _ADVSHIST_H_INCLUDED_
 #define _ADVSHIST_H_INCLUDED_
+#include "autoconfig.h"
 
 #include <vector>
 
diff --git a/src/qtgui/confgui/confgui.h b/src/qtgui/confgui/confgui.h
index 199d1a07..18c081e5 100644
--- a/src/qtgui/confgui/confgui.h
+++ b/src/qtgui/confgui/confgui.h
@@ -16,6 +16,8 @@
  */
 #ifndef _confgui_h_included_
 #define _confgui_h_included_
+#include "autoconfig.h"
+
 /**
  * This file defines a number of simple classes (virtual base: ConfParamW) 
  * which let the user input configuration parameters. 
@@ -36,7 +38,6 @@
  * destroyed and recreated as a copy if Cancel is pressed (you have to 
  * delete/recreate the widgets in this case as the links are no longer valid).
  */
-#include "autoconfig.h"
 
 #include <string>
 #include <limits.h>
diff --git a/src/qtgui/rclmain_w.cpp b/src/qtgui/rclmain_w.cpp
index d2237a33..45a93a1a 100644
--- a/src/qtgui/rclmain_w.cpp
+++ b/src/qtgui/rclmain_w.cpp
@@ -67,6 +67,20 @@
 #include "rclhelp.h"
 #include "moc_rclmain_w.cpp"
 
+/* Qt5 moc expands macros when defining signals. The SIGNAL() macro is
+   a stringification, so it does not expand macros. We have signals
+   where one of the types is a #define (for the variations on
+   std::shared_ptr). In qt5, the connection does not work because the
+   signal string is different between the definition and the connect
+   call, because of the different macro expansion. We have to use
+   another level of macro in Qt5 to force macro expansion, but not in
+   Qt4, so we both define the XSIGNAL and XSLOT macros here, and have
+   ifdefs in the code. What a mess... */
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
+#define XSIGNAL(X) SIGNAL(X)
+#define XSLOT(X) SLOT(X)
+#endif
+
 using std::pair;
 
 QString g_stringAllStem, g_stringNoStem;
@@ -288,13 +302,15 @@ void RclMain::init()
     sc = new QShortcut(seql, this);
     connect(sc, SIGNAL (activated()), sSearch, SLOT (takeFocus()));
 
-    connect(&m_watcher, SIGNAL(fileChanged(QString)), 
-	    this, SLOT(idxStatus()));
-#ifdef _WIN32
-    connect(sSearch, SIGNAL(startSearch(std::shared_ptr<Rcl::SearchData>, bool)), 
-	    this, SLOT(startSearch(std::shared_ptr<Rcl::SearchData>, bool)));
+    connect(&m_watcher, SIGNAL(fileChanged(QString)), this, SLOT(idxStatus()));
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
+    connect(sSearch,
+            XSIGNAL(startSearch(STD_SHARED_PTR<Rcl::SearchData>, bool)), 
+	    this, XSLOT(startSearch(STD_SHARED_PTR<Rcl::SearchData>, bool)));
 #else
-    connect(sSearch, SIGNAL(startSearch(STD_SHARED_PTR<Rcl::SearchData>, bool)), 
+    connect(sSearch,
+            SIGNAL(startSearch(STD_SHARED_PTR<Rcl::SearchData>, bool)), 
 	    this, SLOT(startSearch(STD_SHARED_PTR<Rcl::SearchData>, bool)));
 #endif
     connect(sSearch, SIGNAL(clearSearch()), 
@@ -357,9 +373,9 @@ void RclMain::init()
     restable->setRclMain(this, true);
     connect(actionSaveResultsAsCSV, SIGNAL(triggered()), 
 	    restable, SLOT(saveAsCSV()));
-#ifdef _WIN32
-    connect(this, SIGNAL(docSourceChanged(std::shared_ptr<DocSequence>)),
-	    restable, SLOT(setDocSource(std::shared_ptr<DocSequence>)));
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
+    connect(this, XSIGNAL(docSourceChanged(STD_SHARED_PTR<DocSequence>)),
+	    restable, XSLOT(setDocSource(STD_SHARED_PTR<DocSequence>)));
 #else
     connect(this, SIGNAL(docSourceChanged(STD_SHARED_PTR<DocSequence>)),
 	    restable, SLOT(setDocSource(STD_SHARED_PTR<DocSequence>)));
@@ -393,9 +409,9 @@ void RclMain::init()
 	    this, SLOT(showSnippets(Rcl::Doc)));
 
     reslist->setRclMain(this, true);
-#ifdef _WIN32
-    connect(this, SIGNAL(docSourceChanged(std::shared_ptr<DocSequence>)),
-	    reslist, SLOT(setDocSource(std::shared_ptr<DocSequence>)));
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
+    connect(this, XSIGNAL(docSourceChanged(STD_SHARED_PTR<DocSequence>)),
+	    reslist, XSLOT(setDocSource(STD_SHARED_PTR<DocSequence>)));
 #else
     connect(this, SIGNAL(docSourceChanged(STD_SHARED_PTR<DocSequence>)),
 	    reslist, SLOT(setDocSource(STD_SHARED_PTR<DocSequence>)));
diff --git a/src/qtgui/rclmain_w.h b/src/qtgui/rclmain_w.h
index fc080b30..8e68224a 100644
--- a/src/qtgui/rclmain_w.h
+++ b/src/qtgui/rclmain_w.h
@@ -16,6 +16,7 @@
  */
 #ifndef RCLMAIN_W_H
 #define RCLMAIN_W_H
+#include "autoconfig.h"
 
 #include <qvariant.h>
 #include <qmainwindow.h>
diff --git a/src/qtgui/reslist.h b/src/qtgui/reslist.h
index 77bac2c2..f15b7921 100644
--- a/src/qtgui/reslist.h
+++ b/src/qtgui/reslist.h
@@ -17,15 +17,11 @@
 
 #ifndef _RESLIST_H_INCLUDED_
 #define _RESLIST_H_INCLUDED_
+#include "autoconfig.h"
 
 #include <list>
 #include <utility>
 
-#ifndef NO_NAMESPACES
-using std::list;
-using std::pair;
-#endif
-
 #ifdef RESLIST_TEXTBROWSER
 #include <QTextBrowser>
 #define RESLIST_PARENTCLASS QTextBrowser
@@ -133,7 +129,7 @@ class ResList : public RESLIST_PARENTCLASS
     // docnum. Built while we insert text into the qtextedit
     std::map<int,int>  m_pageParaToReldocnums;
     virtual int docnumfromparnum(int);
-    virtual pair<int,int> parnumfromdocnum(int);
+    virtual std::pair<int,int> parnumfromdocnum(int);
 #else
     // Webview makes it more difficult to append text incrementally,
     // so we store the page and display it when done.
diff --git a/src/qtgui/respopup.h b/src/qtgui/respopup.h
index 65050df4..87936a08 100644
--- a/src/qtgui/respopup.h
+++ b/src/qtgui/respopup.h
@@ -16,6 +16,7 @@
  */
 #ifndef _RESPOPUP_H_INCLUDED_
 #define _RESPOPUP_H_INCLUDED_
+#include "autoconfig.h"
 
 namespace ResultPopup {
     enum Options {showExpand = 0x1, showSubs = 0x2, isMain = 0x3,
diff --git a/src/qtgui/ssearch_w.h b/src/qtgui/ssearch_w.h
index e990a661..ba90ce73 100644
--- a/src/qtgui/ssearch_w.h
+++ b/src/qtgui/ssearch_w.h
@@ -16,6 +16,7 @@
  */
 #ifndef _SSEARCH_W_H_INCLUDED_
 #define _SSEARCH_W_H_INCLUDED_
+#include "autoconfig.h"
 
 #include <string>
 
diff --git a/src/qtgui/xmltosd.h b/src/qtgui/xmltosd.h
index 5040bb1b..43bacf06 100644
--- a/src/qtgui/xmltosd.h
+++ b/src/qtgui/xmltosd.h
@@ -14,6 +14,9 @@
  *   Free Software Foundation, Inc.,
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#ifndef XMLTOSD_H_INCLUDED
+#define XMLTOSD_H_INCLUDED
+#include "autoconfig.h"
 
 /** Parsing XML from saved queries or advanced search history.
  *
@@ -75,3 +78,4 @@ struct SSearchDef {
     int mode;
 };
 bool xmlToSSearch(const string& xml, SSearchDef&);
+#endif /* XMLTOSD_H_INCLUDED */