diff --git a/ompi/mca/btl/gm/btl_gm_component.c b/ompi/mca/btl/gm/btl_gm_component.c
index 8d600350a5..53a02c7cf0 100644
--- a/ompi/mca/btl/gm/btl_gm_component.c
+++ b/ompi/mca/btl/gm/btl_gm_component.c
@@ -285,7 +285,7 @@ mca_btl_gm_module_init (mca_btl_gm_module_t * btl)
             sizeof (mca_btl_gm_frag_eager_t),
             CACHE_LINE_SIZE,
             OBJ_CLASS (mca_btl_gm_frag_eager_t),
-            1 << mca_btl_gm_component.gm_eager_frag_size) + sizeof (uintptr_t),
+            (1 << mca_btl_gm_component.gm_eager_frag_size) + sizeof (uintptr_t),
             CACHE_LINE_SIZE, 
             btl->gm_max_send_tokens,  
             mca_btl_gm_component.gm_free_list_max, 
@@ -296,7 +296,7 @@ mca_btl_gm_module_init (mca_btl_gm_module_t * btl)
             sizeof (mca_btl_gm_frag_max_t),
             CACHE_LINE_SIZE,
             OBJ_CLASS (mca_btl_gm_frag_max_t),
-            1 << mca_btl_gm_component.gm_max_frag_size) + sizeof (uintptr_t),
+            (1 << mca_btl_gm_component.gm_max_frag_size) + sizeof (uintptr_t),
             CACHE_LINE_SIZE,
             btl->gm_max_recv_tokens,
             mca_btl_gm_component.gm_free_list_max,