diff --git a/font-patcher b/font-patcher
index 803be14ed..6269a5586 100755
--- a/font-patcher
+++ b/font-patcher
@@ -71,8 +71,8 @@ actualVersion = int(fontforge.version())
 # versions tested: 20150612, 20150824
 
 if actualVersion < minimumVersion:
-    print("{}: You seem to be using an unsupported (old) version of fontforge: {}".format(projectName, actualVersion))
-    print("{}: Please use at least version: {}".format(projectName, minimumVersion))
+    sys.stderr.write("{}: You seem to be using an unsupported (old) version of fontforge: {}\n".format(projectName, actualVersion))
+    sys.stderr.write("{}: Please use at least version: {}\n".format(projectName, minimumVersion))
     sys.exit(1)
 
 verboseAdditionalFontNameSuffix = " " + projectNameSingular
@@ -151,7 +151,7 @@ try:
     # now we have the correct item:
     subFamily = sourceFont.sfnt_names[subFamilyTupleIndex][sfntNamesStringIDIndex]
 except IndexError:
-    print("{}: Could not find 'SubFamily' for given font, falling back to parsed fontname".format(projectName))
+    sys.stderr.write("{}: Could not find 'SubFamily' for given font, falling back to parsed fontname\n".format(projectName))
     subFamily = fallbackStyle
 
 # some fonts have inaccurate 'SubFamily', if it is Regular let us trust the filename more: