diff --git a/openerp/http.py b/openerp/http.py
index 4a4aac9a7db..b59a4be86cb 100644
--- a/openerp/http.py
+++ b/openerp/http.py
@@ -25,7 +25,6 @@ import warnings
 from zlib import adler32
 
 import babel.core
-import psutil
 import psycopg2
 import simplejson
 import werkzeug.contrib.sessions
@@ -37,6 +36,11 @@ import werkzeug.wrappers
 import werkzeug.wsgi
 from werkzeug.wsgi import wrap_file
 
+try:
+    import psutil
+except ImportError:
+    psutil = None
+
 import openerp
 from openerp import SUPERUSER_ID
 from openerp.service import security, model as service_model
@@ -89,7 +93,8 @@ def dispatch_rpc(service_name, method, params):
         if rpc_request_flag or rpc_response_flag:
             start_time = time.time()
             start_rss, start_vms = 0, 0
-            start_rss, start_vms = psutil.Process(os.getpid()).get_memory_info()
+            if psutil:
+                start_rss, start_vms = psutil.Process(os.getpid()).get_memory_info()
             if rpc_request and rpc_response_flag:
                 openerp.netsvc.log(rpc_request, logging.DEBUG, '%s.%s' % (service_name, method), replace_request_password(params))
 
@@ -110,7 +115,8 @@ def dispatch_rpc(service_name, method, params):
         if rpc_request_flag or rpc_response_flag:
             end_time = time.time()
             end_rss, end_vms = 0, 0
-            end_rss, end_vms = psutil.Process(os.getpid()).get_memory_info()
+            if psutil:
+                end_rss, end_vms = psutil.Process(os.getpid()).get_memory_info()
             logline = '%s.%s time:%.3fs mem: %sk -> %sk (diff: %sk)' % (service_name, method, end_time - start_time, start_vms / 1024, end_vms / 1024, (end_vms - start_vms)/1024)
             if rpc_response_flag:
                 openerp.netsvc.log(rpc_response, logging.DEBUG, logline, result)