diff --git a/c/xlib/type.c b/c/xlib/type.c
index 0f6f8ca..60ed8be 100644
--- a/c/xlib/type.c
+++ b/c/xlib/type.c
@@ -27,7 +27,7 @@ s48_value s48_enter_symbol(char* name) {
 s48_value Bits_To_Symbols(unsigned long bits, SYMDESCR* table) {
   s48_value res = S48_NULL;
   char* name;
-  int val;
+  unsigned long val;
   int i = 0;
   
   S48_DECLARE_GC_PROTECT(1);
@@ -62,7 +62,7 @@ unsigned long Symbol_To_Bit(s48_value Sym, SYMDESCR* table) {
   unsigned long res = 0;
   char* sym = s48_extract_symbol(Sym);
   int i;
-  for (i=0; table[i].val != 0 ;i++) {
+  for (i=0; table[i].name != (char*)0; i++) {
     if (strcmp(sym, table[i].name) == 0) {
       return table[i].val;
     }