diff --git a/src/lib/icu/invoke.ts b/src/lib/icu/invoke.ts
index d19b8ad..c2ec70b 100644
--- a/src/lib/icu/invoke.ts
+++ b/src/lib/icu/invoke.ts
@@ -24,10 +24,13 @@ async function main(argv: string[]) {
       'use --service <path> to set service proto definition url'
     );
   }
-  const sockAddr = args['--sock'] ?? getSockAddr(service);
+  let sockAddr = args['--sock'] ?? getSockAddr(service);
   if (sockAddr == null) {
     throw new IcuError('use --sock <address> to set host address');
   }
+  if (sockAddr.startsWith('/')) {
+    sockAddr = `unix://${sockAddr}`;
+  }
   const { grpcDescriptor } = loadDescriptor(args['--include']);
   const serviceDescriptor: any = _.get(grpcDescriptor, service);
   if (serviceDescriptor == null) {
diff --git a/src/lib/icu/listen.ts b/src/lib/icu/listen.ts
index 3d77a5d..c592651 100644
--- a/src/lib/icu/listen.ts
+++ b/src/lib/icu/listen.ts
@@ -20,6 +20,9 @@ async function main(argv: string[]) {
   if (sockAddr == null) {
     throw new IcuError('use --sock <address> to set host address');
   }
+  if (sockAddr.startsWith('/')) {
+    sockAddr = `unix://${sockAddr}`;
+  }
 
   const guest = new Guest(sockAddr);
   await guest.start();