diff --git a/lib/vty.h b/lib/vty.h
index e515868..1798585 100644
--- a/lib/vty.h
+++ b/lib/vty.h
@@ -149,8 +149,8 @@
 #define PRINTF_ATTRIBUTE(a,b)
 #endif /* __GNUC__ */
 
-/* Utility macros to convert VTY argument to unsigned long or integer. */
-#define VTY_GET_LONG(NAME,V,STR) \
+/* Utility macros to convert VTY argument to unsigned long */
+#define VTY_GET_ULONG(NAME,V,STR) \
 do { \
   char *endptr = NULL; \
   errno = 0; \
@@ -162,20 +162,38 @@
     } \
 } while (0)
 
-#define VTY_GET_INTEGER_RANGE(NAME,V,STR,MIN,MAX) \
-do { \
-  unsigned long tmpl; \
-  VTY_GET_LONG(NAME, tmpl, STR); \
-  if ( (tmpl < (MIN)) || (tmpl > (MAX))) \
-    { \
-      vty_out (vty, "%% Invalid %s value%s", NAME, VTY_NEWLINE); \
-      return CMD_WARNING; \
-    } \
-  (V) = tmpl; \
+/*
+ * The logic below ((TMPL) <= ((MIN) && (TMPL) != (MIN)) is
+ * done to circumvent the compiler complaining about
+ * comparing unsigned numbers against zero, if MIN is zero.
+ * NB: The compiler isn't smart enough to supress the warning
+ * if you write (MIN) != 0 && tmpl < (MIN).
+ */
+#define VTY_GET_INTEGER_RANGE_HEART(NAME,TMPL,STR,MIN,MAX)      \
+do {                                                            \
+  VTY_GET_ULONG(NAME, (TMPL), STR);                             \
+  if ( ((TMPL) <= (MIN) && (TMPL) != (MIN)) || (TMPL) > (MAX) ) \
+    {                                                           \
+      vty_out (vty, "%% Invalid %s value%s", NAME, VTY_NEWLINE);\
+      return CMD_WARNING;                                       \
+    }                                                           \
 } while (0)
 
-#define VTY_GET_INTEGER(NAME,V,STR) \
-  VTY_GET_INTEGER_RANGE(NAME,V,STR,0U,UINT32_MAX)
+#define VTY_GET_INTEGER_RANGE(NAME,V,STR,MIN,MAX)               \
+do {                                                            \
+  unsigned long tmpl;                                           \
+  VTY_GET_INTEGER_RANGE_HEART(NAME,tmpl,STR,MIN,MAX);           \
+  (V) = tmpl;                                                   \
+} while (0)
+
+#define VTY_CHECK_INTEGER_RANGE(NAME,STR,MIN,MAX)               \
+do {                                                            \
+  unsigned long tmpl;                                           \
+  VTY_GET_INTEGER_RANGE_HEART(NAME,tmpl,STR,MIN,MAX);           \
+} while (0)
+
+#define VTY_GET_INTEGER(NAME,V,STR)                             \
+    VTY_GET_INTEGER_RANGE(NAME,V,STR,0U,UINT32_MAX)
 
 #define VTY_GET_IPV4_ADDRESS(NAME,V,STR)                                      \
 do {                                                                             \