diff --git a/lib/ntdllsys/CMakeLists.txt b/lib/ntdllsys/CMakeLists.txt
index aebea333781..04f1d86a065 100644
--- a/lib/ntdllsys/CMakeLists.txt
+++ b/lib/ntdllsys/CMakeLists.txt
@@ -1,4 +1,5 @@
 
 set_source_files_properties(${REACTOS_BINARY_DIR}/lib/ntdllsys/ntdll.S PROPERTIES GENERATED TRUE)
-add_library(ntdllsys ${REACTOS_BINARY_DIR}/lib/ntdllsys/ntdll.S)
+add_library(ntdllsys STATIC ${REACTOS_BINARY_DIR}/lib/ntdllsys/ntdll.S)
 add_dependencies(ntdllsys ntdll_S)
+set_target_properties(ntdllsys PROPERTIES LINKER_LANGUAGE C)