diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt
index a4dcc0d5..da3fb3cd 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt
@@ -195,7 +195,7 @@ open class JvmCompilerPlugin @Inject constructor(
         }
     }
 
-    val allProjects = arrayListOf<ProjectDescription>()
+    private val allProjects = arrayListOf<ProjectDescription>()
 
     // IProjectContributor
     override fun projects() = allProjects