diff --git a/appveyor.yml b/appveyor.yml
index bd695fde..adc57d48 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -43,7 +43,7 @@ build_script:
 - cmd: mingw32-make.exe -C src MINGW=1 WARNINGMODE=1 NOASM=1 NOUPX=1 GCC52=1 SDL=1 ERRORMODE=1
 
 after_build:
-- set BUILD_ARCHIVE=%APPVEYOR_REPO_BRANCH%-%APPVEYOR_REPO_COMMIT%.7
+- set BUILD_ARCHIVE=%APPVEYOR_REPO_BRANCH%-%APPVEYOR_REPO_COMMIT%.7z
 - cmd: 7z a %BUILD_ARCHIVE% bin\Mingw\Release -x!.gitignore
 - appveyor PushArtifact %BUILD_ARCHIVE%