diff --git a/ked/csl/stm32f042/config.cmake b/ked/csl/stm32f042/config.cmake
index c299e66..dbbd76d 100644
--- a/ked/csl/stm32f042/config.cmake
+++ b/ked/csl/stm32f042/config.cmake
@@ -79,4 +79,5 @@ list(APPEND EXTRA_LIBS sub::max7219)
 list(APPEND EXTRA_LIBS sub::spi)
 list(APPEND EXTRA_LIBS sub::imp_spi)
 list(APPEND EXTRA_LIBS sub::pin)
-list(APPEND EXTRA LIBS sub::ad9833)
+list(APPEND EXTRA_LIBS sub::ad9833)
+