diff --git a/services.cc b/services.cc
index c94385705..c0185080b 100644
--- a/services.cc
+++ b/services.cc
@@ -174,6 +174,9 @@ static int nmap_services_init() {
     if (res == 3) {
       ratio = 0;
     } else if (res == 5) {
+      if (ratio_n < 0 || ratio_d < 0)
+        fatal("%s:%d contains an invalid negative value", filename, lineno);
+
       if (ratio_n > ratio_d)
         fatal("%s:%d has a ratio %g. All ratios must be < 1", filename, lineno, (double)ratio_n/ratio_d);
 
diff --git a/utils.cc b/utils.cc
index ba250d35e..1d97b6119 100644
--- a/utils.cc
+++ b/utils.cc
@@ -128,8 +128,8 @@ int wildtest(char *wild, char *test) {
       if (wild[1] == '\0') return 1;
 
       for(i=0; test[i]!='\0'; i++)
-        if ((wild[1] == test[i]  ||  wild[1] == '?')
-             &&  wildtest(wild+1, test+i) == 1) return 1;
+        if ((tolower((int)wild[1]) == tolower((int)test[i]) || wild[1] == '?')
+            &&  wildtest(wild+1, test+i) == 1) return 1;
 
       return 0;
     }