diff --git a/tests/pkg_cmsis-nn/Makefile b/tests/pkg_cmsis-nn/Makefile
index 6b3dbc4f00..9da69cf9e8 100644
--- a/tests/pkg_cmsis-nn/Makefile
+++ b/tests/pkg_cmsis-nn/Makefile
@@ -21,3 +21,6 @@ BOARD_WHITELIST := \
   #
 
 include $(RIOTBASE)/Makefile.include
+
+# TODO: Get rid of this flag
+CFLAGS += -Wno-cast-align