diff --git a/src/main/kotlin/com/beust/kobalt/Plugins.kt b/src/main/kotlin/com/beust/kobalt/Plugins.kt
index a8125a4f..4fd68e90 100644
--- a/src/main/kotlin/com/beust/kobalt/Plugins.kt
+++ b/src/main/kotlin/com/beust/kobalt/Plugins.kt
@@ -166,7 +166,7 @@ public class Plugins @Inject constructor (val taskManagerProvider : Provider<Tas
         if (method.returnType != TaskResult::class.java) {
             throw IllegalArgumentException("${t}should return a TaskResult")
         }
-        if (method.parameterCount != 1) {
+        if (method.parameterTypes.size() != 1) {
             throw IllegalArgumentException("${t}should take exactly one parameter of type a Project")
         }
         with(method.parameterTypes) {
diff --git a/src/main/kotlin/com/beust/kobalt/plugin/publish/JCenterApi.kt b/src/main/kotlin/com/beust/kobalt/plugin/publish/JCenterApi.kt
index e2a8ea4b..82ffea1d 100644
--- a/src/main/kotlin/com/beust/kobalt/plugin/publish/JCenterApi.kt
+++ b/src/main/kotlin/com/beust/kobalt/plugin/publish/JCenterApi.kt
@@ -124,8 +124,8 @@ public class JCenterApi @Inject constructor (@Nullable @Assisted("username") val
         } else {
             result = TaskResult(false, failures.values().join(" "))
             error("Failed to upload ${failures.size()} files:")
-            failures.forEach { k, v ->
-                error(" - ${k} : ${v}")
+            failures.forEach{ entry ->
+                error(" - ${entry.key} : ${entry.value}")
             }
         }