diff --git a/src/plugins/simulator/fs9/fs9.pro b/src/plugins/simulator/fs9/fs9.pro
index f567f7ee1..8b546cfad 100644
--- a/src/plugins/simulator/fs9/fs9.pro
+++ b/src/plugins/simulator/fs9/fs9.pro
@@ -1,6 +1,6 @@
 load(common_pre)
 
-QT       += core dbus gui network concurrent xml
+QT       += core dbus gui network xml
 
 TARGET = simulatorfs9
 TEMPLATE = lib
diff --git a/src/plugins/simulator/fscommon/fscommon.pro b/src/plugins/simulator/fscommon/fscommon.pro
index 4305e2123..d6cc482ab 100644
--- a/src/plugins/simulator/fscommon/fscommon.pro
+++ b/src/plugins/simulator/fscommon/fscommon.pro
@@ -1,6 +1,6 @@
 load(common_pre)
 
-QT       += core dbus concurrent xml network
+QT       += core dbus xml network
 
 TARGET = simulatorfscommon
 TEMPLATE = lib
diff --git a/src/plugins/simulator/fsx/fsx.pro b/src/plugins/simulator/fsx/fsx.pro
index 5e560da58..e50fc0dbd 100644
--- a/src/plugins/simulator/fsx/fsx.pro
+++ b/src/plugins/simulator/fsx/fsx.pro
@@ -2,7 +2,7 @@ load(common_pre)
 
 REQUIRES += contains(BLACK_CONFIG,FSX)
 
-QT       += core dbus gui network concurrent xml
+QT       += core dbus gui network xml
 
 TARGET = simulatorfsx
 TEMPLATE = lib
diff --git a/src/plugins/simulator/fsxcommon/fsxcommon.pro b/src/plugins/simulator/fsxcommon/fsxcommon.pro
index e20c6332c..8d523b158 100644
--- a/src/plugins/simulator/fsxcommon/fsxcommon.pro
+++ b/src/plugins/simulator/fsxcommon/fsxcommon.pro
@@ -1,6 +1,6 @@
 load(common_pre)
 
-QT += core dbus concurrent xml network widgets
+QT += core dbus xml network widgets
 
 TARGET = simulatorfsxcommon
 TEMPLATE = lib
diff --git a/src/plugins/simulator/p3d/p3d.pro b/src/plugins/simulator/p3d/p3d.pro
index 407f8ccd9..ac6f2eeb9 100644
--- a/src/plugins/simulator/p3d/p3d.pro
+++ b/src/plugins/simulator/p3d/p3d.pro
@@ -2,7 +2,7 @@ load(common_pre)
 
 REQUIRES += contains(BLACK_CONFIG,P3D)
 
-QT       += core dbus gui network concurrent xml
+QT       += core dbus gui network xml
 
 TARGET = simulatorp3d
 TEMPLATE = lib