diff --git a/src/support/filetools.cpp b/src/support/filetools.cpp
index 8f409d7cae..ac46e8efe1 100644
--- a/src/support/filetools.cpp
+++ b/src/support/filetools.cpp
@@ -607,15 +607,11 @@ string latexEnvCmdPrefix(string const & path)
 		return "env TEXINPUTS=\"." + sep + texinputs_prefix
 					  + sep + texinputs + "\" ";
 	else
-#ifndef USE_QPROCESS
-		return "cmd /d /c set \"TEXINPUTS=."
+		// NOTE: the dummy blank dir is necessary to force the
+		//       QProcess parser to quote the argument (see bug 9453)
+		return "cmd /d /c set \"TEXINPUTS=." + sep + " "
 						+ sep + texinputs_prefix
-						+ sep + texinputs + "\"&";
-#else
-		return "cmd /d /c set \"\"\"TEXINPUTS=."
-						+ sep + texinputs_prefix
-						+ sep + texinputs + "\"\"\"&";
-#endif
+						+ sep + texinputs + "\" & ";
 }
 
 
diff --git a/status.21x b/status.21x
index 53b30e3e0c..24082c1cf9 100644
--- a/status.21x
+++ b/status.21x
@@ -87,6 +87,8 @@ What's new
 - Fix conversion of beamer block arguments where the overlay argument and the
   closing title argument bracket share the same ERT (bug 9411).
 
+- Fix handling of the TEXINPUTS environment variable on Windows (bug 9453).
+
 
 
 * USER INTERFACE