diff --git a/src/frontends/qt4/GuiInclude.cpp b/src/frontends/qt4/GuiInclude.cpp
index d713ef20e2..5dc776c821 100644
--- a/src/frontends/qt4/GuiInclude.cpp
+++ b/src/frontends/qt4/GuiInclude.cpp
@@ -317,14 +317,17 @@ bool GuiInclude::isValid()
 		okPB->setText(qt_("&OK"));
 		return true;
 	}
-	// Do we have a LyX filename?
-	if (!isLyXFileName(fromqstr(fname))) {
-		okPB->setText(qt_("&OK"));
-		return false;
-	}
+
 	string const bpath = buffer().filePath();
 	// Path might be relative to current Buffer, so make absolute
 	FileName const absfname = support::makeAbsPath(fromqstr(fname), bpath);
+
+	// Do we have a LyX filename?
+	if (!isLyXFileName(fromqstr(fname))) {
+		okPB->setText(qt_("&OK"));
+		return absfname.exists();
+	}
+
 	// Set OK button text according to whether file already exists
 	okPB->setText(absfname.exists() ? qt_("&OK") : qt_("&Create"));
 	// enable edit button iff file is open in some Buffer
diff --git a/status.23x b/status.23x
index 0647c39070..36ec3669d1 100644
--- a/status.23x
+++ b/status.23x
@@ -76,11 +76,13 @@ What's new
 
 * USER INTERFACE
 
-- Fix crash when pasting math grid with more rows in source than target
-  (bug 11897).
+- Re-enable input of non-LyX files (e.g., tex, pgf) (bug 12056).
 
 - Fix problem with display of menus on Gnome Wayland (bug 11746).
 
+- Fix crash when pasting math grid with more rows in source than target
+  (bug 11897).
+
 - Fix problem with drawing of auto-opened insets (bug 11870).
 
 - Fix crash when rejecting changes and the cursor is in an inset that will be