diff --git a/app/cmake/ZephyrBuildConfig.cmake b/app/cmake/ZephyrBuildConfig.cmake
index 81b3eb9c..294098b4 100644
--- a/app/cmake/ZephyrBuildConfig.cmake
+++ b/app/cmake/ZephyrBuildConfig.cmake
@@ -114,8 +114,9 @@ endforeach()
 # overlay/conf/keymap files.
 if(DEFINED SHIELD)
 	foreach(s ${SHIELD_AS_LIST})
-		message(STATUS ${SHIELD_DIR_${s}})
-		get_filename_component(shield_dir_name ${SHIELD_DIR_${s}} NAME)
+		if (DEFINED $SHIELD_DIR_${s})
+			get_filename_component(shield_dir_name ${SHIELD_DIR_${s}} NAME)
+		endif()
 		string(REPLACE "_" ";" S_PIECES ${s})
 		list(LENGTH S_PIECES S_PIECES_LEN)
 		while(NOT S_PIECES STREQUAL "")