diff --git a/src/mca/mca.h b/src/mca/mca.h
index e6ef19986b..dc4cedd5e8 100644
--- a/src/mca/mca.h
+++ b/src/mca/mca.h
@@ -111,14 +111,14 @@ struct mca_base_param_t {
 
   mca_base_param_storage_t lsbp_default_value;
 };
-struct mca_base_param_t mca_base_param_t;
+typedef struct mca_base_param_t mca_base_param_t;
 
 
 /*
  * Variable holding the array of registered MCA parameters
  */
 
-extern lam_array_t *mca_base_params;
+extern lam_array_t mca_base_params;
 
 
 /*