diff --git a/source/cl_parse.c b/source/cl_parse.c
index 7a7a711..efedb68 100644
--- a/source/cl_parse.c
+++ b/source/cl_parse.c
@@ -1130,6 +1130,13 @@ void CL_ParseServerMessage (void)
 			MSG_ReadByte();
 			break;
 
+		case svc_rumble:
+			// This platform doesn't use this.
+			MSG_ReadShort();
+			MSG_ReadShort();
+			MSG_ReadShort();
+			break;
+
 		case svc_screenflash:
 			screenflash_color = MSG_ReadByte();
 			screenflash_duration = sv.time + MSG_ReadByte();
diff --git a/source/pr_cmds.c b/source/pr_cmds.c
index 7b54bb5..319a821 100644
--- a/source/pr_cmds.c
+++ b/source/pr_cmds.c
@@ -3345,6 +3345,39 @@ void PF_LockViewmodel(void)
 	MSG_WriteByte (&client->message, state);
 }
 
+/*
+=================
+PF_Rumble
+
+Server tells client to rumble their
+GamePad.
+
+nzp_rumble()
+=================
+*/
+void PF_Rumble(void)
+{
+	client_t	*client;
+	int			entnum;
+	int 		low_frequency;
+	int 		high_frequency;
+	int 		duration;
+
+	entnum = G_EDICTNUM(OFS_PARM0);
+	low_frequency = G_FLOAT(OFS_PARM1);
+	high_frequency = G_FLOAT(OFS_PARM2);
+	duration = G_FLOAT(OFS_PARM3);
+
+	if (entnum < 1 || entnum > svs.maxclients)
+		return;
+
+	client = &svs.clients[entnum-1];
+	MSG_WriteByte (&client->message, svc_rumble);
+	MSG_WriteShort (&client->message, low_frequency);
+	MSG_WriteShort (&client->message, high_frequency);
+	MSG_WriteShort (&client->message, duration);
+}
+
 /*
 =================
 PF_ScreenFlash
@@ -4058,6 +4091,8 @@ PF_BettyPrompt, // #504
 PF_SetPlayerName, // #505
 PF_SetDoubleTapVersion, // #506
 PF_ScreenFlash, // #507
+PF_LockViewmodel, // #508
+PF_Rumble, // #509
 PF_Fixme,
 };
 
diff --git a/source/protocol.h b/source/protocol.h
index 529e597..ea52ec4 100644
--- a/source/protocol.h
+++ b/source/protocol.h
@@ -160,6 +160,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #define svc_doubletap		49
 #define svc_screenflash		50		// [byte] color [byte] duration [byte] type
 #define svc_lockviewmodel	51
+#define svc_rumble			52 		// [short] low frequency [short] high frequency [short] duration (ms)
 
 //
 // client to server