Index: libunwind/src/CMakeLists.txt
===================================================================
--- libunwind/src/CMakeLists.txt
+++ libunwind/src/CMakeLists.txt
@@ -26,7 +26,7 @@
     )
 set_source_files_properties(${LIBUNWIND_ASM_SOURCES}
                             PROPERTIES
-                              LANGUAGE C)
+                            LANGUAGE ASM)
 
 set(LIBUNWIND_HEADERS
     AddressSpace.hpp