diff --git a/adb/adb.cpp b/adb/adb.cpp
index c78076d..9abcc73 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -696,7 +696,7 @@
 // Try to handle a network forwarding request.
 // This returns 1 on success, 0 on failure, and -1 to indicate this is not
 // a forwarding-related request.
-int handle_forward_request(const char* service, TransportType type, char* serial, int reply_fd)
+int handle_forward_request(const char* service, TransportType type, const char* serial, int reply_fd)
 {
     if (!strcmp(service, "list-forward")) {
         // Create the list of forward redirections.
@@ -796,7 +796,7 @@
     return 0;
 }
 
-int handle_host_request(char *service, TransportType type, char* serial, int reply_fd, asocket *s)
+int handle_host_request(const char* service, TransportType type, const char* serial, int reply_fd, asocket *s)
 {
     if(!strcmp(service, "kill")) {
         fprintf(stderr,"adb server killed by remote request\n");
@@ -856,7 +856,7 @@
     if (!strncmp(service, "disconnect:", 11)) {
         char buffer[4096];
         memset(buffer, 0, sizeof(buffer));
-        char* serial = service + 11;
+        const char* serial = service + 11;
         if (serial[0] == 0) {
             // disconnect from all TCP devices
             unregister_all_tcp_transports();
diff --git a/adb/adb.h b/adb/adb.h
index 5d20165..daabf8c 100644
--- a/adb/adb.h
+++ b/adb/adb.h
@@ -284,7 +284,7 @@
 int       create_jdwp_connection_fd(int  jdwp_pid);
 #endif
 
-int handle_forward_request(const char* service, TransportType type, char* serial, int reply_fd);
+int handle_forward_request(const char* service, TransportType type, const char* serial, int reply_fd);
 
 #if !ADB_HOST
 void framebuffer_service(int fd, void *cookie);
@@ -366,7 +366,7 @@
 #define USB_FFS_ADB_IN    USB_FFS_ADB_EP(ep2)
 #endif
 
-int handle_host_request(char *service, TransportType type, char* serial, int reply_fd, asocket *s);
+int handle_host_request(const char* service, TransportType type, const char* serial, int reply_fd, asocket *s);
 
 void handle_online(atransport *t);
 void handle_offline(atransport *t);