diff --git a/engine/qclib/qccmain.c b/engine/qclib/qccmain.c
index 069d95cc2..25f12b7aa 100644
--- a/engine/qclib/qccmain.c
+++ b/engine/qclib/qccmain.c
@@ -433,17 +433,22 @@ void QCC_InitData (void)
 	numfunctions = 1;
 	numglobaldefs = 1;
 	numfielddefs = 1;
+
+	memset(&ret_temp, 0, sizeof(ret_temp));
 	
 	def_ret.ofs = OFS_RETURN;
 	def_ret.name = "return";
 	def_ret.temp = &ret_temp;
 	def_ret.constant = false;
+	def_ret.type	= NULL;
 	ret_temp.ofs = def_ret.ofs;
 	ret_temp.scope = NULL;
 	ret_temp.size = 3;
 	ret_temp.next = NULL;
 	for (i=0 ; i<MAX_PARMS ; i++)
 	{
+		def_parms[i].temp = NULL;
+		def_parms[i].type = NULL;
 		def_parms[i].ofs = OFS_PARM0 + 3*i;
 		def_parms[i].name = parmname[i];
 		sprintf(parmname[i], "parm%i", i);