diff --git a/datokenizer_test.go b/datokenizer_test.go
index d476316..815f926 100644
--- a/datokenizer_test.go
+++ b/datokenizer_test.go
@@ -553,29 +553,27 @@
 	assert.Equal(len(tokens), 3)
 
 	// testTokenizerFile1
-	/*
-				tokens = tokenize(dat, w, "Zeig mir c:\\Dokumente\\profile.docx")
-				assert.Equal(tokens[0], "Zeig")
-				assert.Equal(tokens[1], "mir")
-				assert.Equal(tokens[2], "c:\\Dokumente\\profile.docx")
-				assert.Equal(len(tokens), 3)
 
+	tokens = tokenize(dat, w, "Zeig mir c:\\Dokumente\\profile.docx")
+	assert.Equal(tokens[0], "Zeig")
+	assert.Equal(tokens[1], "mir")
+	assert.Equal(tokens[2], "c:\\Dokumente\\profile.docx")
+	assert.Equal(len(tokens), 3)
 
-			// testTokenizerFile2
-			tokens = tokenize(dat, w, "Gehe zu /Dokumente/profile.docx")
-			assert.Equal(tokens[0], "Gehe")
-			assert.Equal(tokens[1], "zu")
-			assert.Equal(tokens[2], "/Dokumente/profile.docx")
-			assert.Equal(len(tokens), 3)
+	// testTokenizerFile2
+	tokens = tokenize(dat, w, "Gehe zu /Dokumente/profile.docx")
+	assert.Equal(tokens[0], "Gehe")
+	assert.Equal(tokens[1], "zu")
+	assert.Equal(tokens[2], "/Dokumente/profile.docx")
+	assert.Equal(len(tokens), 3)
 
-		// testTokenizerFile3
-		tokens = tokenize(dat, w, "Zeig mir c:\\Dokumente\\profile.jpeg")
-		assert.Equal(tokens[0], "Zeig")
-		assert.Equal(tokens[1], "mir")
-		assert.Equal(tokens[2], "c:\\Dokumente\\profile.jpeg")
-		assert.Equal(len(tokens), 3)
-		// Ignored in KorAP-Tokenizer
-	*/
+	// testTokenizerFile3
+	tokens = tokenize(dat, w, "Zeig mir c:\\Dokumente\\profile.jpeg")
+	assert.Equal(tokens[0], "Zeig")
+	assert.Equal(tokens[1], "mir")
+	assert.Equal(tokens[2], "c:\\Dokumente\\profile.jpeg")
+	assert.Equal(len(tokens), 3)
+	// Ignored in KorAP-Tokenizer
 
 	// testTokenizerPunct
 	tokens = tokenize(dat, w, "Er sagte: \"Es geht mir gut!\", daraufhin ging er.")
diff --git a/src/tokenizer.xfst b/src/tokenizer.xfst
index 977e144..780884a 100644
--- a/src/tokenizer.xfst
+++ b/src/tokenizer.xfst
@@ -16,6 +16,7 @@
 define NLin ("\u000d") "\u000a";
 
 define Digit [%0|1|2|3|4|5|6|7|8|9];
+define AsciiLetter [a|b|c|d|e|f|g|h|i|j|k|l|m|n|o|p|q|r|s|t|u|v|w|x|y|z];
 
 !!!!!!!!!!!!!!!!!
 ! <from tmorph> !
@@ -152,9 +153,11 @@
                 {xls}|
                 {xml}|
                 {aac}|
-                {gif}
+                {gif}|
+                {exe}
                 ] .o. Caseinsensitive;
-define File [Char|"-"]+ "." FileEnd;
+
+define File (( AsciiLetter ":" %\ | "/" ) [ Char | "_" | "-" | Char [ %\ | "/" ] ]*) [Char | "-" | "_" ]+ "." FileEnd;
 
 define Streetname Word {str} %.;
 
@@ -176,10 +179,6 @@
 
 ! TODO: Name words with ' and `
 
-! TODO:
-!   FNAME = (({LETTER}:[\\/])?|\/)?({LETTER}+|[\\_/-])+\.{EXTENSION}
-
-
 ! Support ASCII elements, like
 ! +---------------+
 ! <---->, -->, <--