diff --git a/src/linemeasurement/__main__.py b/src/linemeasurement/__main__.py
index 877dd1f..6539adc 100644
--- a/src/linemeasurement/__main__.py
+++ b/src/linemeasurement/__main__.py
@@ -177,6 +177,8 @@ def demo3():
 def fit_measurement(file, show_all):
     if file[0] in "\"'" and file[0] == file[-1]:
         file = file[1:-1]
+    if "/" in file:
+        file = file.replace("\\", "")
     raw_wl, raw_intens = osaload(file, normalize=True)
     _o = raw_wl.argsort()
     raw_intens = raw_intens[_o]