diff --git a/.gitignore b/.gitignore
index 0f4625fb9a..78c9a620ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,9 @@
 /html/nbproject/
 *.project
 
+# CLion files
+.idea
+
 #
 *.pfx
 *.pvk
diff --git a/win_build/unittests_vs2019.vcxproj b/win_build/unittests_vs2019.vcxproj
index cd79b1cb81..6527f10f43 100644
--- a/win_build/unittests_vs2019.vcxproj
+++ b/win_build/unittests_vs2019.vcxproj
@@ -94,6 +94,7 @@
     <ClCompile Include="..\tests\unit-tests\lib\test_parse.cpp" />
     <ClCompile Include="..\tests\unit-tests\lib\test_str_util.cpp" />
     <ClCompile Include="..\tests\unit-tests\lib\test_url.cpp" />
+    <ClCompile Include="..\tests\unit-tests\lib\test_base64.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="libboinc_vs2019.vcxproj">