diff --git a/include/gargoyle/codex.h b/include/gargoyle/codex.h
index 0d09ba1..aa3edd6 100644
--- a/include/gargoyle/codex.h
+++ b/include/gargoyle/codex.h
@@ -12,5 +12,6 @@ static const uint8_t GARGOYLE_TYPE_DBLE = 1 << 4;
 static const uint8_t GARGOYLE_ERR_SUCCESS = 0;
 static const uint8_t GARGOYLE_ERR_UNKNOWN_OPT = 1;
 static const uint8_t GARGOYLE_ERR_VALUE_REQUIRED = 2;
+static const uint8_t GARGOYLE_ERR_INVALID_UINT = 3;
 
 #endif
diff --git a/src/scribe.c b/src/scribe.c
index 4701faf..b46ee6c 100644
--- a/src/scribe.c
+++ b/src/scribe.c
@@ -1,6 +1,7 @@
 #include <gargoyle/codex.h>
 #include <gargoyle/scribe.h>
 #include <gargoyle/twine.h>
+#include <stdlib.h>
 
 uint8_t gargoyle_from_bool(struct gargoyle_opt *opt, const char *brand) {
   if(opt->val) {
@@ -12,5 +13,15 @@ uint8_t gargoyle_from_bool(struct gargoyle_opt *opt, const char *brand) {
 }
 
 uint8_t gargoyle_from_rope(struct gargoyle_opt *opt, const char *brand) {
+  if(opt->type & GARGOYLE_TYPE_UINT) {
+    char *end = NULL;
+    uint64_t *val = opt->val;
+    *val = strtoull(brand, &end, 10);
+
+    if(*end) {
+      return GARGOYLE_ERR_INVALID_UINT;
+    }
+  }
+
   return 0;
 }