diff --git a/src/FSharpLint.Core/Application/Lint.fsi b/src/FSharpLint.Core/Application/Lint.fsi
index bf8f05ec0..464858bb0 100644
--- a/src/FSharpLint.Core/Application/Lint.fsi
+++ b/src/FSharpLint.Core/Application/Lint.fsi
@@ -129,7 +129,7 @@ module Lint =
           SyntaxArray: AbstractSyntaxArray.Node array }
 
     /// Runs all rules which take a node of the AST as input.
-    val runAstNodeRules : RunAstNodeRulesConfig -> Suggestion.LintWarning array * Context
+    val runAstNodeRules : RunAstNodeRulesConfig -> Suggestion.LintWarning [] * Context
 
     type RunLineRulesConfig = { LineRules: Configuration.LineRules 
                                 GlobalConfig: Rules.GlobalRuleConfig