Correctly set compression specific general purpose bit flags.
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 2cdc286..9c35878 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -129,6 +129,7 @@
   zip_source_filep.c
   zip_source_free.c
   zip_source_function.c
+  zip_source_get_compression_flags.c
   zip_source_is_deleted.c
   zip_source_layered.c
   zip_source_open.c