diff --git a/reaction/code/client/cl_cgame.c b/reaction/code/client/cl_cgame.c
index 3c351a13..8c01d06d 100644
--- a/reaction/code/client/cl_cgame.c
+++ b/reaction/code/client/cl_cgame.c
@@ -401,6 +401,17 @@ void CL_ShutdownCGame( void ) {
 	cgvm = NULL;
 }
 
+/*
+====================
+CL_RQ3_Key_KeynumToStringBuf
+====================
+*/
+static void CL_RQ3_Key_KeynumToStringBuf( int keynum, char *buf, int buflen ) {
+	Q_strncpyz( buf, Key_KeynumToString( keynum ), buflen );
+}
+
+
+
 static int	FloatAsInt( float f ) {
 	floatint_t fi;
 	fi.f = f;
@@ -699,6 +710,10 @@ intptr_t CL_CgameSystemCalls( intptr_t *args ) {
 	case CG_R_INPVS:
 		return re.inPVS( VMA(1), VMA(2) );
 
+	case CG_RQ3_KEY_KEYNUMTOSTRINGBUF:
+		CL_RQ3_Key_KeynumToStringBuf( args[1], VMA(2), args[3] );
+		return 0;
+
 	default:
 	        assert(0);
 		Com_Error( ERR_DROP, "Bad cgame system trap: %ld", (long int) args[0] );