diff --git a/scripts/specialize-patch b/scripts/specialize-patch
index b10179c6b..aee6563e8 100755
--- a/scripts/specialize-patch
+++ b/scripts/specialize-patch
@@ -215,19 +215,19 @@ function evaluate(stmnt, pattern, arg, op, result) {
       sub(pattern, (op[1] != 0) && (op[2] != 0), stmnt)
     }
   
-    pattern="^+#if[[:blank:]]*([01])[[:blank:]]*\\&\\&[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z_]*[[:blank:]]*\\))$"
+    pattern="^+#if[[:blank:]]*([01])[[:blank:]]*\\&\\&[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z0-9_]*[[:blank:]]*\\))$"
     while (match(stmnt, pattern, op) != 0)
     {
       stmnt = "+#if " (op[1] != 0 ? op[2] : op[1])
     }
   
-    pattern="^+#if[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z_]*[[:blank:]]*\\))\\&\\&[[:blank:]]*([01])[[:blank:]]*$"
+    pattern="^+#if[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z0-9_]*[[:blank:]]*\\))\\&\\&[[:blank:]]*([01])[[:blank:]]*$"
     while (match(stmnt, pattern, op) != 0)
     {
       stmnt = "+#if " (op[2] != 0 ? op[1] : op[2])
     }
   
-    pattern="^+#if[[:blank:]]*(!*[[:blank:]]*[A-Za-z_]*)[[:blank:]]*\\&\\&[[:blank:]]*([01])[[:blank:]]*$"
+    pattern="^+#if[[:blank:]]*(!*[[:blank:]]*[A-Za-z0-9_]*)[[:blank:]]*\\&\\&[[:blank:]]*([01])[[:blank:]]*$"
     while (match(stmnt, pattern, op) != 0)
     {
       stmnt = "+#if " (op[2] != 0 ? op[1] : op[2])
@@ -239,13 +239,13 @@ function evaluate(stmnt, pattern, arg, op, result) {
       sub(pattern, (op[1] != 0) || (op[2] != 0), stmnt)
     }
   
-    pattern="^+#if[[:blank:]]*([01])[[:blank:]]*\\|\\|[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z_]*[[:blank:]]*\\))$"
+    pattern="^+#if[[:blank:]]*([01])[[:blank:]]*\\|\\|[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z0-9_]*[[:blank:]]*\\))$"
     while (match(stmnt, pattern, op) != 0)
     {
       stmnt = "+#if " (op[1] == 0 ? op[2] : op[1])
     }
   
-    pattern="\\(([01])[[:blank:]]*\\|\\|[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z_]*[[:blank:]]*\\))\\)"
+    pattern="\\(([01])[[:blank:]]*\\|\\|[[:blank:]]*(!*[[:blank:]]*defined[[:blank:]]*\\([[:blank:]]*[A-Za-z0-9_]*[[:blank:]]*\\))\\)"
     while (match(stmnt, pattern, op) != 0)
     {
       sub(pattern, op[1] == 0 ? op[2] : op[1], stmnt)