diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index e040dadf6f..d9206b3bff 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -293,10 +293,21 @@ isEmpty(BOOST_INCLUDE_PATH) {
     macx:BOOST_INCLUDE_PATH = /opt/local/include
 }
 
-windows:LIBS += -lmingwthrd -lws2_32 -lshlwapi
-windows:DEFINES += _MT WIN32
+windows:LIBS += -lws2_32 -lshlwapi
+windows:DEFINES += WIN32
 windows:RC_FILE = src/qt/res/bitcoin-qt.rc
 
+windows:!contains(MINGW_THREAD_BUGFIX, 0) {
+    # At least qmake's win32-g++-cross profile is missing the -lmingwthrd
+    # thread-safety flag. GCC has -mthreads to enable this, but it doesn't
+    # work with static linking. -lmingwthrd must come BEFORE -lmingw, so
+    # it is prepended to QMAKE_LIBS_QT_ENTRY.
+    # It can be turned off with MINGW_THREAD_BUGFIX=0, just in case it causes
+    # any problems on some untested qmake profile now or in the future.
+    DEFINES += _MT
+    QMAKE_LIBS_QT_ENTRY = -lmingwthrd $$QMAKE_LIBS_QT_ENTRY
+}
+
 !windows:!mac {
     DEFINES += LINUX
     LIBS += -lrt
diff --git a/contrib/gitian-descriptors/qt-win32.yml b/contrib/gitian-descriptors/qt-win32.yml
index adccebbb91..6eb76b2170 100644
--- a/contrib/gitian-descriptors/qt-win32.yml
+++ b/contrib/gitian-descriptors/qt-win32.yml
@@ -47,7 +47,6 @@ script: |
   cp -a bin $SRCDIR/
   cd $INSTDIR
   find . -name *.prl | xargs -l sed 's|/$||' -i
-  sed 's/QMAKE_LIBS_QT_ENTRY     = -lmingw32 -lqtmain/QMAKE_LIBS_QT_ENTRY     = -lqtmain/' -i mkspecs/unsupported/win32-g++-cross/qmake.conf
   #sed 's|QMAKE_PRL_LIBS.*|QMAKE_PRL_LIBS = -lQtDeclarative -lQtScript -lQtSvg -lQtSql -lQtXmlPatterns -lQtGui -lgdi32 -lcomdlg32 -loleaut32 -limm32 -lwinmm -lwinspool -lmsimg32 -lQtNetwork -lQtCore -lole32 -luuid -lws2_32 -ladvapi32 -lshell32 -luser32 -lkernel32|' -i imports/Qt/labs/particles/qmlparticlesplugin.prl
 
   # as zip stores file timestamps, use faketime to intercept stat calls to set dates for all files to reference date