diff --git a/README.md b/README.md
index 6547376..7fd69c0 100644
--- a/README.md
+++ b/README.md
@@ -258,7 +258,7 @@ The given steps or post-processors may be specified as strings (for the default
 ### warnMissing
 
 Type: 'boolean'
-Default: `nil`
+Default: `false`
 
 Whether usemin should issue a warning when it can't find one of the sources
 referenced in a block. For backwards compatibility, this is off by default.