diff --git a/templates/nsis/include/allowOnlyOneInstallerInstance.nsh b/templates/nsis/include/allowOnlyOneInstallerInstance.nsh
index a1fd1875d852ff69c087a3103eff827c20d37ca5..5222614ddad3276876857e7a9dde4017a6b9fc85 100644
--- a/templates/nsis/include/allowOnlyOneInstallerInstance.nsh
+++ b/templates/nsis/include/allowOnlyOneInstallerInstance.nsh
@@ -42,7 +42,7 @@
     ${nsProcess::FindProcess} "${_FILE}" ${_ERR}
   !else
     # find process owned by current user
-    nsExec::Exec `cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq ${_FILE}" | %SYSTEMROOT%\System32\find.exe "${_FILE}"`
+    nsExec::Exec `cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "PID ne $pid" /FI "IMAGENAME eq ${_FILE}" | %SYSTEMROOT%\System32\find.exe "${_FILE}"`
     Pop ${_ERR}
   !endif
 !macroend