diff --git a/tasks/main.yml b/tasks/main.yml
index aa55d8d..1729c3a 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -222,6 +222,7 @@
                 imagePullPolicy: IfNotPresent
                 command:
                   - p2pool
+                # P2Pool takes "--opt value" only; "--opt=value" makes it exit.
                 args: >-
                   {{
                     ['--host', 'monerod',
@@ -234,7 +235,7 @@
                     + ['--tls-cert', '/etc/letsencrypt/tls.crt',
                        '--tls-cert-key', '/etc/letsencrypt/tls.key',
                        '--rpc-ssl',
-                       '--rpc-login=$(MONEROD_RPC_LOGIN)']
+                       '--rpc-login', '$(MONEROD_RPC_LOGIN)']
                   }}
                 env:
                   - name: MONEROD_RPC_LOGIN