diff --git a/ompi/mca/btl/tcp/btl_tcp_frag.c b/ompi/mca/btl/tcp/btl_tcp_frag.c
index 80a50175e2..b6e7713914 100644
--- a/ompi/mca/btl/tcp/btl_tcp_frag.c
+++ b/ompi/mca/btl/tcp/btl_tcp_frag.c
@@ -112,7 +112,7 @@ bool mca_btl_tcp_frag_send(mca_btl_tcp_frag_t* frag, int sd)
             case EWOULDBLOCK:
                 return false;
             case EFAULT:
-                BTL_ERROR(("mca_btl_tcp_frag_send: writev error (%p, %d)\n\t%s(%d)\n",
+                BTL_ERROR(("mca_btl_tcp_frag_send: writev error (%p, %zd)\n\t%s(%zd)\n",
                     frag->iov_ptr[0].iov_base, frag->iov_ptr[0].iov_len,
                     strerror(opal_socket_errno), frag->iov_cnt));
                 mca_btl_tcp_endpoint_close(frag->endpoint);
@@ -204,7 +204,7 @@ bool mca_btl_tcp_frag_recv(mca_btl_tcp_frag_t* frag, int sd)
 	case EWOULDBLOCK:
 	    return false;
 	case EFAULT:
-            BTL_ERROR(("mca_btl_tcp_frag_recv: readv error (%p, %d)\n\t%s(%d)\n",
+            BTL_ERROR(("mca_btl_tcp_frag_recv: readv error (%p, %zd)\n\t%s(%zd)\n",
                        frag->iov_ptr[0].iov_base, frag->iov_ptr[0].iov_len,
                        strerror(opal_socket_errno), frag->iov_cnt));
 	    mca_btl_tcp_endpoint_close(btl_endpoint);
diff --git a/ompi/mca/btl/tcp/btl_tcp_proc.c b/ompi/mca/btl/tcp/btl_tcp_proc.c
index 02fe5be36a..533f4d84b8 100644
--- a/ompi/mca/btl/tcp/btl_tcp_proc.c
+++ b/ompi/mca/btl/tcp/btl_tcp_proc.c
@@ -131,7 +131,7 @@ mca_btl_tcp_proc_t* mca_btl_tcp_proc_create(ompi_proc_t* ompi_proc)
         return NULL;
     }
     if(0 != (size % sizeof(mca_btl_tcp_addr_t))) {
-        BTL_ERROR(("mca_base_modex_recv: invalid size %d: btl-size: %d\n",
+        BTL_ERROR(("mca_base_modex_recv: invalid size %zd: btl-size: %ld\n",
           size, sizeof(mca_btl_tcp_addr_t)));
         return NULL;
     }