diff --git a/rtengine/camconst.json b/rtengine/camconst.json
index 7f481e104..128ba3e24 100644
--- a/rtengine/camconst.json
+++ b/rtengine/camconst.json
@@ -1481,6 +1481,12 @@ Camera constants:
         }
     },
 
+    { // Quality B
+        "make_model": "NIKON COOLPIX P1000",
+        "dcraw_matrix": [ 14294, -6116, -1333, -1628, 10219, 1637, -14, 1158, 5022 ], // ColorMatrix2 from Adobe DNG Converter 11.4
+        "ranges": { "black": 200 }
+    },
+
     { // Quality B, no LENR samples
         "make_model": "Nikon D5",
         "dcraw_matrix": [ 9200,-3522,-992,-5755,13803,2117,-753,1486,6338 ], // adobe dng_v9.5 d65
diff --git a/rtgui/extprog.cc b/rtgui/extprog.cc
index 95c1c937d..00ea07713 100644
--- a/rtgui/extprog.cc
+++ b/rtgui/extprog.cc
@@ -334,7 +334,7 @@ bool ExtProgStore::openInCustomEditor (const Glib::ustring& fileName)
 
 #else
 
-    const auto cmdLine = Glib::ustring("\"") + options.customEditorProg + "\" " + Glib::shell_quote(fileName);
+    const auto cmdLine = options.customEditorProg + Glib::ustring(" ") + Glib::shell_quote(fileName);
     return spawnCommandAsync (cmdLine);
 
 #endif