diff --git a/code/game/bg_lib.h b/code/game/bg_lib.h
index 9d2b6232..13549517 100644
--- a/code/game/bg_lib.h
+++ b/code/game/bg_lib.h
@@ -60,6 +60,22 @@ typedef char *  va_list;
 #define LONG_MAX      2147483647L   /* maximum (signed) long value */
 #define ULONG_MAX     0xffffffffUL  /* maximum unsigned long value */
 
+#define isalnum(c)  (isalpha(c) || isdigit(c))
+#define isalpha(c)  (isupper(c) || islower(c))
+#define isascii(c)  ((c) > 0 && (c) <= 0x7f)
+#define iscntrl(c)  (((c) >= 0) && (((c) <= 0x1f) || ((c) == 0x7f)))
+#define isdigit(c)  ((c) >= '0' && (c) <= '9')
+#define isgraph(c)  ((c) != ' ' && isprint(c)
+#define islower(c)  ((c) >=  'a' && (c) <= 'z')
+#define isprint(c)  ((c) >= ' ' && (c) <= '~')
+#define ispunct(c)  (((c) > ' ' && (c) <= '~') && !isalnum(c))
+#define isspace(c)  ((c) ==  ' ' || (c) == '\f' || (c) == '\n' || (c) == '\r' || \
+                     (c) == '\t' || (c) == '\v')
+#define isupper(c)  ((c) >=  'A' && (c) <= 'Z')
+#define isxdigit(c) (isxupper(c) || isxlower(c))
+#define isxlower(c) (isdigit(c) || (c >= 'a' && c <= 'f'))
+#define isxupper(c) (isdigit(c) || (c >= 'A' && c <= 'F')) 
+
 // Misc functions
 typedef int cmp_t(const void *, const void *);
 void qsort(void *a, size_t n, size_t es, cmp_t *cmp);
diff --git a/code/qcommon/q_shared.h b/code/qcommon/q_shared.h
index 458c53c6..559f99f4 100644
--- a/code/qcommon/q_shared.h
+++ b/code/qcommon/q_shared.h
@@ -330,7 +330,7 @@ extern	vec4_t		colorMdGrey;
 extern	vec4_t		colorDkGrey;
 
 #define Q_COLOR_ESCAPE	'^'
-#define Q_IsColorString(p)	( p && *(p) == Q_COLOR_ESCAPE && *((p)+1) && *((p)+1) != Q_COLOR_ESCAPE )
+#define Q_IsColorString(p)	( p && *(p) == Q_COLOR_ESCAPE && *((p)+1) && isalnum(*((p)+1)) ) // ^[0-9a-zA-Z]
 
 #define COLOR_BLACK		'0'
 #define COLOR_RED		'1'