diff --git a/src/cfgparse.c b/src/cfgparse.c
index 90825c067..7f11bf884 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -5948,8 +5948,9 @@ int check_config_validity()
 				/* we force the backend to be present on at least all of
 				 * the frontend's processes.
 				 */
-				target->bind_proc = curproxy->bind_proc ?
-					(target->bind_proc | curproxy->bind_proc) : 0;
+				if (target->bind_proc)
+					target->bind_proc = curproxy->bind_proc ?
+						(target->bind_proc | curproxy->bind_proc) : 0;
 
 				/* Emit a warning if this proxy also has some servers */
 				if (curproxy->srv) {
@@ -5985,8 +5986,9 @@ int check_config_validity()
 					/* we force the backend to be present on at least all of
 					 * the frontend's processes.
 					 */
-					target->bind_proc = curproxy->bind_proc ?
-						(target->bind_proc | curproxy->bind_proc) : 0;
+					if (target->bind_proc)
+						target->bind_proc = curproxy->bind_proc ?
+							(target->bind_proc | curproxy->bind_proc) : 0;
 				}
 			}
 		}
@@ -6038,8 +6040,9 @@ int check_config_validity()
 				/* we force the backend to be present on at least all of
 				 * the frontend's processes.
 				 */
-				target->bind_proc = curproxy->bind_proc ?
-					(target->bind_proc | curproxy->bind_proc) : 0;
+				if (target->bind_proc)
+					target->bind_proc = curproxy->bind_proc ?
+						(target->bind_proc | curproxy->bind_proc) : 0;
 			}
 		}