diff --git a/.gitignore b/.gitignore
index 3084e84..7384f6b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 *~
 *.o
 build*
+/tmp
diff --git a/README.md b/README.md
index b4ef457..b5ab344 100644
--- a/README.md
+++ b/README.md
@@ -158,6 +158,10 @@ files.
 	                       NOTE: When using only the 'mpg123' format but not 'id3v2' any ID3v2
 	                       tag will be stripped. ID3v1 tags will still be kept.
 
+	                       NOTE: The 'text' format might detect too much bogus text in UTF-16 or
+	                       UTF-32 encodings. I recommend to use 'utf-8' or 'ascii' instead, if
+	                       you can.
+
 	                       If '-' is written before a format name the format will be
 	                       removed from the set of formats to extract. E.g. extract
 	                       everything except tracker files:
diff --git a/src/mediaextract.c b/src/mediaextract.c
index fe52cf8..e62487f 100644
--- a/src/mediaextract.c
+++ b/src/mediaextract.c
@@ -229,6 +229,10 @@ static int usage(int argc, char **argv)
 		"                         NOTE: When using only the 'mpg123' format but not 'id3v2' any ID3v2\n"
 		"                         tag will be stripped. ID3v1 tags will still be kept.\n"
 		"\n"
+		"                         NOTE: The 'text' format might detect too much bogus text in UTF-16 or\n"
+		"                         UTF-32 encodings. I recommend to use 'utf-8' or 'ascii' instead, if\n"
+		"                         you can.\n"
+		"\n"
 		"                         If '-' is written before a format name the format will be\n"
 		"                         removed from the set of formats to extract. E.g. extract\n"
 		"                         everything except tracker files:\n"