diff --git a/mkspecs/dilos-g++/qmake.conf b/mkspecs/dilos-g++/qmake.conf
index 669c316d..8574f9bf 100644
--- a/mkspecs/dilos-g++/qmake.conf
+++ b/mkspecs/dilos-g++/qmake.conf
@@ -5,7 +5,7 @@
 
 MAKEFILE_GENERATOR	= UNIX
 TEMPLATE		= app
-CONFIG			+= qt warn_on release incremental link_prl thread
+CONFIG			+= qt warn_on release incremental link_prl
 QMAKE_INCREMENTAL_STYLE = sublib
 
 QMAKE_CC		= gcc
diff --git a/mkspecs/freebsd-clang/qmake.conf b/mkspecs/freebsd-clang/qmake.conf
index a3a2da46..639052d9 100644
--- a/mkspecs/freebsd-clang/qmake.conf
+++ b/mkspecs/freebsd-clang/qmake.conf
@@ -5,7 +5,7 @@
 
 MAKEFILE_GENERATOR	= UNIX
 TEMPLATE		= app
-CONFIG			+= qt warn_on release thread link_prl
+CONFIG			+= qt warn_on release link_prl
 
 QMAKE_CC		= clang
 QMAKE_LEX		= flex
diff --git a/mkspecs/linux-clang/qmake.conf b/mkspecs/linux-clang/qmake.conf
index 6ed9a256..2e229674 100644
--- a/mkspecs/linux-clang/qmake.conf
+++ b/mkspecs/linux-clang/qmake.conf
@@ -5,7 +5,7 @@
 
 MAKEFILE_GENERATOR	= UNIX
 TEMPLATE		= app
-CONFIG			+= qt warn_on release incremental link_prl thread
+CONFIG			+= qt warn_on release incremental link_prl
 QMAKE_INCREMENTAL_STYLE = sublib
 
 QMAKE_CC		= clang
diff --git a/mkspecs/linux-g++-sparc/qmake.conf b/mkspecs/linux-g++-sparc/qmake.conf
index 79010acd..4c39abcb 100644
--- a/mkspecs/linux-g++-sparc/qmake.conf
+++ b/mkspecs/linux-g++-sparc/qmake.conf
@@ -5,7 +5,7 @@
 
 MAKEFILE_GENERATOR	= UNIX
 TEMPLATE		= app
-CONFIG			+= qt warn_on release incremental link_prl thread
+CONFIG			+= qt warn_on release incremental link_prl
 QMAKE_INCREMENTAL_STYLE = sublib
 
 QMAKE_CC		= gcc
diff --git a/mkspecs/linux-g++/qmake.conf b/mkspecs/linux-g++/qmake.conf
index ad959384..f717e6fe 100644
--- a/mkspecs/linux-g++/qmake.conf
+++ b/mkspecs/linux-g++/qmake.conf
@@ -5,7 +5,7 @@
 
 MAKEFILE_GENERATOR	= UNIX
 TEMPLATE		= app
-CONFIG			+= qt warn_on release incremental link_prl thread
+CONFIG			+= qt warn_on release incremental link_prl
 QMAKE_INCREMENTAL_STYLE = sublib
 
 QMAKE_CC		= gcc