diff --git a/FlightGear.iss b/FlightGear.iss
index 7662436..2dada03 100755
--- a/FlightGear.iss
+++ b/FlightGear.iss
@@ -111,7 +111,7 @@ Source: "{#OSGInstallDir}\bin\osg{#OSGSoNumber}-osgViewer.dll"; DestDir: "{app}\
 Source: "{#OSGInstallDir}\bin\osg{#OSGSoNumber}-osgSim.dll"; DestDir: "{app}\bin\Win32"; Check: not Is64BitInstallMode or IsTaskSelected('force32')
 Source: "{#OSGInstallDir}\bin\osg{#OSGSoNumber}-osgFX.dll"; DestDir: "{app}\bin\Win32"; Check: not Is64BitInstallMode or IsTaskSelected('force32')
 
-Source: "{#OSGInstallDir}\bin\ot12-OpenThreads.dll"; DestDir: "{app}\bin\Win32"; Check: not Is64BitInstallMode or IsTaskSelected('force32')
+Source: "{#OSGInstallDir}\bin\ot{#OTSoNumber}-OpenThreads.dll"; DestDir: "{app}\bin\Win32"; Check: not Is64BitInstallMode or IsTaskSelected('force32')
 
 Source: "{#OSGPluginsDir}\osgdb_ac.dll"; DestDir: "{app}\bin\Win32\osgPlugins-{#OSGVersion}"; Check: not Is64BitInstallMode or IsTaskSelected('force32')
 Source: "{#OSGPluginsDir}\osgdb_osg.dll"; DestDir: "{app}\bin\Win32\osgPlugins-{#OSGVersion}"; Check: not Is64BitInstallMode or IsTaskSelected('force32')
@@ -147,7 +147,7 @@ Source: "{#OSG64InstallDir}\bin\osg{#OSGSoNumber}-osgViewer.dll"; DestDir: "{app
 Source: "{#OSG64InstallDir}\bin\osg{#OSGSoNumber}-osgSim.dll"; DestDir: "{app}\bin\Win64"; Flags: skipifsourcedoesntexist; Check: Is64BitInstallMode and not IsTaskSelected('force32')
 Source: "{#OSG64InstallDir}\bin\osg{#OSGSoNumber}-osgFX.dll"; DestDir: "{app}\bin\Win64"; Flags: skipifsourcedoesntexist; Check: Is64BitInstallMode and not IsTaskSelected('force32')
 
-Source: "{#OSG64InstallDir}\bin\ot12-OpenThreads.dll"; DestDir: "{app}\bin\Win64"; Flags: skipifsourcedoesntexist; Check: Is64BitInstallMode and not IsTaskSelected('force32')
+Source: "{#OSG64InstallDir}\bin\ot{#OTSoNumber}-OpenThreads.dll"; DestDir: "{app}\bin\Win64"; Flags: skipifsourcedoesntexist; Check: Is64BitInstallMode and not IsTaskSelected('force32')
 
 Source: "{#OSG64PluginsDir}\osgdb_ac.dll"; DestDir: "{app}\bin\Win64\osgPlugins-{#OSGVersion}"; Flags: skipifsourcedoesntexist; Check: Is64BitInstallMode and not IsTaskSelected('force32')
 Source: "{#OSG64PluginsDir}\osgdb_osg.dll"; DestDir: "{app}\bin\Win64\osgPlugins-{#OSGVersion}"; Flags: skipifsourcedoesntexist; Check: Is64BitInstallMode and not IsTaskSelected('force32')
diff --git a/hudson_win_package_release.bat b/hudson_win_package_release.bat
index c214c4b..e8224f1 100644
--- a/hudson_win_package_release.bat
+++ b/hudson_win_package_release.bat
@@ -17,14 +17,17 @@ set PATH=%PATH%;C:\Program Files\7-zip
 REM indirect way to get command output into an environment variable
 osgversion --so-number > %TEMP%\osg-so-number.txt
 osgversion --version-number > %TEMP%\osg-version.txt
+osgversion --openthreads-soversion-number > %TEMP%\openthreads-so-number.txt
 
 SET /P FLIGHTGEAR_VERSION=<flightgear\version
 SET /P OSG_VERSION=<%TEMP%\osg-version.txt
 SET /P OSG_SO_NUMBER=<%TEMP%\osg-so-number.txt
+SET /P OT_SO_NUMBER=<%TEMP%\openthreads-so-number.txt
 
 ECHO #define FGVersion "%FLIGHTGEAR_VERSION%" > InstallConfig.iss
 ECHO #define OSGVersion "%OSG_VERSION%" >> InstallConfig.iss
 ECHO #define OSGSoNumber "%OSG_SO_NUMBER%" >> InstallConfig.iss
+ECHO #define OTSoNumber "%OT_SO_NUMBER%" >> InstallConfig.iss
 
 set DATA_FILE=FlightGear-%FLIGHTGEAR_VERSION%-data