diff --git a/proxy/create_exec_interceptor.go b/proxy/create_exec_interceptor.go
index 72e62730..33e655d9 100644
--- a/proxy/create_exec_interceptor.go
+++ b/proxy/create_exec_interceptor.go
@@ -29,7 +29,9 @@ func (i *createExecInterceptor) InterceptRequest(r *http.Request) error {
 		return err
 	}
 
-	if cidrs, ok := i.proxy.weaveCIDRsFromConfig(container.Config); ok {
+	_, hasWeaveWait := container.Volumes["/w"]
+	cidrs, hasCIDRs := i.proxy.weaveCIDRsFromConfig(container.Config)
+	if hasCIDRs && hasWeaveWait {
 		Info.Printf("Exec in container %s with WEAVE_CIDR \"%s\"", container.ID, strings.Join(cidrs, " "))
 		cmd := append(weaveWaitEntrypoint, "-s")
 		options.Cmd = append(cmd, options.Cmd...)
diff --git a/test/610_proxy_wait_for_weave_test.sh b/test/610_proxy_wait_for_weave_test.sh
index 49d023e9..204f86cc 100755
--- a/test/610_proxy_wait_for_weave_test.sh
+++ b/test/610_proxy_wait_for_weave_test.sh
@@ -21,4 +21,8 @@ COMMITTED_IMAGE=$(proxy docker_on $HOST1 commit c1)
 assert_raises "proxy docker_on $HOST1 run --name c2 $COMMITTED_IMAGE"
 assert "entrypoint c2" "$(entrypoint $COMMITTED_IMAGE)"
 
+# Check exec works on containers without weavewait
+docker_on $HOST1 run -dit --name c3 $SMALL_IMAGE /bin/sh
+assert_raises "proxy docker_on $HOST1 exec c3 true"
+
 end_suite