diff --git a/src/solidlsp/ls_utils.py b/src/solidlsp/ls_utils.py
index 7ff1bb71..f00e1f04 100644
--- a/src/solidlsp/ls_utils.py
+++ b/src/solidlsp/ls_utils.py
@@ -210,7 +210,7 @@ class TextUtils:
         text_stepper = TextStepper(text)
         while text_stepper.line < line:
             if not text_stepper.step_line():
-                raise InvalidTextLocationError("{line=}, {col=}")
+                raise InvalidTextLocationError(f"{line=}, {col=}")
 
         return text_stepper.line_start_idx + col