diff --git a/.gitignore b/.gitignore
index 0726b4c3c..b6e21c0c8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 **/CMakeCache.txt
 **/CMakeFiles
-build
 checker
 abi-checker
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 621acacf1..81b80591d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,11 @@ project(FreeRDP LANGUAGES C)
 
 add_custom_target(fuzzers COMMENT "Build fuzzers")
 
+if(NOT PROJECT_SOURCE_DIR STREQUAL PROJECT_BINARY_DIR)
+  # Git auto-ignore out-of-source build directory
+  file(GENERATE OUTPUT .gitignore CONTENT "*")
+endif()
+
 if(NOT DEFINED VENDOR)
   set(VENDOR "FreeRDP" CACHE STRING "FreeRDP package vendor")
 endif()