diff --git a/lib/args.c b/lib/args.c
index 594a1b470..1f42cddeb 100644
--- a/lib/args.c
+++ b/lib/args.c
@@ -97,8 +97,8 @@ struct opts {
   struct opts *next;
   long *arg;         // Pointer into union "this" to store arguments at.
   int c;             // Argument character to match
-  int flags;         // |=1, ^=2
-  unsigned dex[3];   // which bits to disable/enable/exclude in toys.optflags
+  int flags;         // |=1, ^=2, " "=4, ;=8
+  unsigned long long dex[3]; // bits to disable/enable/exclude in toys.optflags
   char type;         // Type of arguments to store union "this"
   union {
     long l;
@@ -142,7 +142,7 @@ static int gotflag(struct getoptflagstate *gof, struct opts *opt)
   // Might enabling this switch off something else?
   if (toys.optflags & opt->dex[0]) {
     struct opts *clr;
-    unsigned i = 1;
+    unsigned long long i = 1;
 
     // Forget saved argument for flag we switch back off
     for (clr=gof->opts, i=1; clr; clr = clr->next, i<<=1)
@@ -326,7 +326,7 @@ void parse_optflaglist(struct getoptflagstate *gof)
   // (This goes right to left so we need the whole list before we can start.)
   idx = 0;
   for (new = gof->opts; new; new = new->next) {
-    unsigned u = 1<<idx++;
+    unsigned long long u = 1L<<idx++;
 
     if (new->c == 1) new->c = 0;
     new->dex[1] = u;
@@ -378,7 +378,7 @@ void get_optflags(void)
 {
   struct getoptflagstate gof;
   struct opts *catch;
-  long saveflags;
+  unsigned long long saveflags;
   char *letters[]={"s",""};
 
   // Option parsing is a two stage process: parse the option string into
diff --git a/scripts/mkflags.c b/scripts/mkflags.c
index b57f05777..e7ed684a7 100644
--- a/scripts/mkflags.c
+++ b/scripts/mkflags.c
@@ -116,8 +116,8 @@ int main(int argc, char *argv[])
   // See "intentionally crappy", above.
   if (!(out = outbuf)) return 1;
 
-  printf("#ifdef FORCE_FLAGS\n#define FORCED_FLAG 1\n"
-         "#else\n#define FORCED_FLAG 0\n#endif\n\n");
+  printf("#ifdef FORCE_FLAGS\n#define FORCED_FLAG 1\n#define FORCED_FLAGLL 1LL\n"
+         "#else\n#define FORCED_FLAG 0\n#define FORCED_FLAGLL 0\n#endif\n\n");
 
   for (;;) {
     struct flag *flist, *aflist, *offlist;
@@ -173,27 +173,33 @@ int main(int argc, char *argv[])
     out += strlen(out);
 
     while (aflist) {
+      char *llstr = bit>31 ? "LL" : "";
+
+      // Output flag macro for bare longopts
       if (aflist->lopt) {
         if (flist && flist->lopt &&
             !strcmp(flist->lopt->command, aflist->lopt->command))
         {
-          sprintf(out, "#define FLAG_%s (1<<%d)\n", flist->lopt->command, bit);
+          sprintf(out, "#define FLAG_%s (1%s<<%d)\n", flist->lopt->command,
+            llstr, bit);
           flist->lopt = flist->lopt->next;
-        } else sprintf(out, "#define FLAG_%s (FORCED_FLAG<<%d)\n",
-                       aflist->lopt->command, bit);
+        } else sprintf(out, "#define FLAG_%s (FORCED_FLAG%s<<%d)\n",
+                       aflist->lopt->command, llstr, bit);
         aflist->lopt = aflist->lopt->next;
         if (!aflist->command) {
           aflist = aflist->next;
           bit++;
           if (flist) flist = flist->next;
         }
+      // Output normal flag macro
       } else if (aflist->command) {
         if (flist && (!flist->command || *aflist->command == *flist->command)) {
           if (aflist->command)
-            sprintf(out, "#define FLAG_%c (1<<%d)\n", *aflist->command, bit);
+            sprintf(out, "#define FLAG_%c (1%s<<%d)\n", *aflist->command,
+              llstr, bit);
           flist = flist->next;
-        } else sprintf(out, "#define FLAG_%c (FORCED_FLAG<<%d)\n",
-                       *aflist->command, bit);
+        } else sprintf(out, "#define FLAG_%c (FORCED_FLAG%s<<%d)\n",
+                       *aflist->command, llstr, bit);
         bit++;
         aflist = aflist->next;
       }
diff --git a/toys.h b/toys.h
index 9c33ff21e..688d55850 100644
--- a/toys.h
+++ b/toys.h
@@ -122,7 +122,7 @@ extern struct toy_context {
   struct toy_list *which;  // Which entry in toy_list is this one?
   char **argv;             // Original command line arguments
   char **optargs;          // Arguments left over from get_optflags()
-  unsigned optflags;       // Command line option flags from get_optflags()
+  unsigned long long optflags; // Command line option flags from get_optflags()
   int exitval;             // Value error_exit feeds to exit()
   int optc;                // Count of optargs
   int old_umask;           // Old umask preserved by TOYFLAG_UMASK
diff --git a/toys/example/test_many_options.c b/toys/example/test_many_options.c
new file mode 100644
index 000000000..d2f5c846c
--- /dev/null
+++ b/toys/example/test_many_options.c
@@ -0,0 +1,22 @@
+/* test_many_options.c - test more than 32 bits worth of option flags
+ *
+ * Copyright 2015 Rob Landley <rob@landley.net>
+
+USE_TEST_MANY_OPTIONS(NEWTOY(test_many_options, "ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba", TOYFLAG_USR|TOYFLAG_BIN))
+
+config TEST_MANY_OPTIONS
+  bool "test_many_options"
+  default n
+  help
+    usage: test_many_options -[a-zA-Z]
+
+    Print the optflags value of the command arguments, in hex.
+*/
+
+#define FOR_test_many_options
+#include "toys.h"
+
+void test_many_options_main(void)
+{
+  xprintf("optflags=%llx\n", toys.optflags);
+}