diff --git a/.gitignore b/.gitignore
index 6013a4d73..31aadaf0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,4 @@ apidocs
 build
 minsize
 fastdev
+debug
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 14b663e6e..4a6270c7f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,7 +41,7 @@ set(CPACK_PACKAGE_VERSION_MAJOR "4")
 set(CPACK_PACKAGE_VERSION_MINOR "9")
 set(CPACK_PACKAGE_VERSION_PATCH "0")
 set(CPACK_SET_DESTDIR TRUE)
-set(CPACK_SOURCE_IGNORE_FILES "/build/;/minsize/;/fastdev/;/apidocs/;/.git;${CPACK_SOURCE_IGNORE_FILES}")
+set(CPACK_SOURCE_IGNORE_FILES "/build/;/minsize/;/debug/;/apidocs/;/.git;${CPACK_SOURCE_IGNORE_FILES}")
 set(CPACK_STRIP_FILES TRUE)
 if(NOT CMAKE_VERSION VERSION_LESS "3.1.0")
     set(CPACK_GENERATOR "TXZ")