diff --git a/wscript b/wscript
index 987035f2..faed5470 100644
--- a/wscript
+++ b/wscript
@@ -352,6 +352,7 @@ def configure(conf):
 		opt_cflags = [
 			'-Werror=declaration-after-statement',
 			'-Werror=enum-conversion',
+			'-Wno-error=enum-float-conversion', # need this for cvars
 			'-Werror=implicit-int',
 			'-Werror=implicit-function-declaration',
 			'-Werror=incompatible-pointer-types',