diff --git a/scripts/bytecodecompare/prepare_report.py b/scripts/bytecodecompare/prepare_report.py
index d654569a4..744c6deb5 100755
--- a/scripts/bytecodecompare/prepare_report.py
+++ b/scripts/bytecodecompare/prepare_report.py
@@ -27,7 +27,7 @@ class FileReport:
         report = ""
 
         if self.contract_reports is None:
-            return f"{self.file_name}: <ERROR>\n"
+            return f"{self.file_name.as_posix()}: <ERROR>\n"
 
         for contract_report in self.contract_reports:
             bytecode = contract_report.bytecode if contract_report.bytecode is not None else '<NO BYTECODE>'
@@ -35,8 +35,8 @@ class FileReport:
 
             # NOTE: Ignoring contract_report.file_name because it should always be either the same
             # as self.file_name (for Standard JSON) or just the '<stdin>' placeholder (for CLI).
-            report += f"{self.file_name}:{contract_report.contract_name} {bytecode}\n"
-            report += f"{self.file_name}:{contract_report.contract_name} {metadata}\n"
+            report += f"{self.file_name.as_posix()}:{contract_report.contract_name} {bytecode}\n"
+            report += f"{self.file_name.as_posix()}:{contract_report.contract_name} {metadata}\n"
 
         return report