diff --git a/ompi/mca/btl/tcp/btl_tcp_frag.c b/ompi/mca/btl/tcp/btl_tcp_frag.c
index b6e7713914..a49653ecb6 100644
--- a/ompi/mca/btl/tcp/btl_tcp_frag.c
+++ b/ompi/mca/btl/tcp/btl_tcp_frag.c
@@ -112,9 +112,9 @@ 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, %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));
+                BTL_ERROR(("mca_btl_tcp_frag_send: writev error (%p, %lu)\n\t%s(%lu)\n",
+                    frag->iov_ptr[0].iov_base, (unsigned long) frag->iov_ptr[0].iov_len,
+                    strerror(opal_socket_errno), (unsigned long) frag->iov_cnt));
                 mca_btl_tcp_endpoint_close(frag->endpoint);
                 return false;
             default:
@@ -204,9 +204,9 @@ 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, %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));
+            BTL_ERROR(("mca_btl_tcp_frag_recv: readv error (%p, %lu)\n\t%s(%lu)\n",
+                       frag->iov_ptr[0].iov_base, (unsigned long) frag->iov_ptr[0].iov_len,
+                       strerror(opal_socket_errno), (unsigned long) frag->iov_cnt));
 	    mca_btl_tcp_endpoint_close(btl_endpoint);
 	    return false;
 	default:
diff --git a/ompi/mca/btl/tcp/btl_tcp_proc.c b/ompi/mca/btl/tcp/btl_tcp_proc.c
index 533f4d84b8..bbfc9bbdae 100644
--- a/ompi/mca/btl/tcp/btl_tcp_proc.c
+++ b/ompi/mca/btl/tcp/btl_tcp_proc.c
@@ -131,8 +131,8 @@ 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 %zd: btl-size: %ld\n",
-          size, sizeof(mca_btl_tcp_addr_t)));
+        BTL_ERROR(("mca_base_modex_recv: invalid size %lu: btl-size: %ld\n",
+          (unsigned long) size, sizeof(mca_btl_tcp_addr_t)));
         return NULL;
     }
     btl_proc->proc_addr_count = size / sizeof(mca_btl_tcp_addr_t);