diff --git a/src/exabgp/configuration/configuration.py b/src/exabgp/configuration/configuration.py
index 015b32288..7fae35597 100644
--- a/src/exabgp/configuration/configuration.py
+++ b/src/exabgp/configuration/configuration.py
@@ -447,7 +447,7 @@ def validate(self):
         for neighbor in self.neighbors.values():
             for notification in neighbor.api:
                 for api in neighbor.api[notification]:
-                    if not self.processes[api].get('run', ''):
+                    if neighbor.api[notification] != [neighbor.PROCESS_ALL] and not self.processes[api].get('run', ''):
                         return self.error.set(
                             "\n\nan api called '%s' is used by neighbor '%s' but not defined\n\n"
                             % (api, neighbor['peer-address']),