diff --git a/cmake/attaConfig.cmake.in b/cmake/attaConfig.cmake.in
index 1c47fbe5..60b9008b 100644
--- a/cmake/attaConfig.cmake.in
+++ b/cmake/attaConfig.cmake.in
@@ -12,7 +12,8 @@ set(atta_DEFINITIONS "@ATTA_DEFINITIONS@")
 set(atta_PCH "@ATTA_INSTALL_PCH@")
 set(atta_FOUND TRUE)
 
-macro(atta_add_target target sources)
+macro(atta_add_target target)
+    set(sources ${ARGN})
     if(ATTA_STATIC_PROJECT)
         add_library(${target} STATIC ${sources})
     else()