diff --git a/frappy/lib/__init__.py b/frappy/lib/__init__.py
index 4e6a92e3..d9b415df 100644
--- a/frappy/lib/__init__.py
+++ b/frappy/lib/__init__.py
@@ -499,7 +499,7 @@ def delayed_import(modname):
     return module
 
 
-def matches_with_string_precision(floatstring, value: float) -> bool:
+def matches_with_string_precision(floatstring, value):
     """check if floatstring is equal to value within precision derived from floatstring
 
     the result is tolerant to any deviation less than one unit of the last given digit