diff --git a/Lib/tokenize.py b/Lib/tokenize.py
index 65d06e5..396ec2e 100644
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -131,7 +131,7 @@ Floatnumber = group(Pointfloat, Expfloat)
 Imagnumber = group(r'[0-9]+[jJ]', Floatnumber + r'[jJ]')
 Number = group(Imagnumber, Floatnumber, Intnumber)
 
-StringPrefix = r'(?:[bB][rR]?|[rR][bB]?|[uU])?'
+StringPrefix = r'(?:[bB][rR]?|[rR][bB]?|[fF]|[uU])?'
 
 # Tail end of ' string.
 Single = r"[^'\\]*(?:\\.[^'\\]*)*'"
@@ -186,10 +186,12 @@ endpats = {"'": Single, '"': Double,
            "Rb'''": Single3, 'Rb"""': Double3,
            "rB'''": Single3, 'rB"""': Double3,
            "RB'''": Single3, 'RB"""': Double3,
+           "f'''": Single3, 'f"""': Double3,
+           "F'''": Single3, 'F"""': Double3,
            "u'''": Single3, 'u"""': Double3,
            "U'''": Single3, 'U"""': Double3,
            'r': None, 'R': None, 'b': None, 'B': None,
-           'u': None, 'U': None}
+           'f': None, 'F': None, 'u': None, 'U': None}
 
 triple_quoted = {}
 for t in ("'''", '"""',
@@ -199,6 +201,7 @@ for t in ("'''", '"""',
           "bR'''", 'bR"""', "BR'''", 'BR"""',
           "rb'''", 'rb"""', "rB'''", 'rB"""',
           "Rb'''", 'Rb"""', "RB'''", 'RB"""',
+          "f'''", 'f"""', "F'''", 'F"""',
           "u'''", 'u"""', "U'''", 'U"""',
           ):
     triple_quoted[t] = t
@@ -210,6 +213,7 @@ for t in ("'", '"',
           "bR'", 'bR"', "BR'", 'BR"' ,
           "rb'", 'rb"', "rB'", 'rB"',
           "Rb'", 'Rb"', "RB'", 'RB"' ,
+          "f'", 'f"', "F'", 'F"',
           "u'", 'u"', "U'", 'U"',
           ):
     single_quoted[t] = t