Index: uspace/lib/libc/include/ctype.h
===================================================================
--- uspace/lib/libc/include/ctype.h	(revision 183b4a0393aa46bfad167fbb74800f1c62ecf819)
+++ uspace/lib/libc/include/ctype.h	(revision 4ec91b2fbbc88da298736671cc23c63ab5e8ec4c)
@@ -36,7 +36,12 @@
 #define LIBC_CTYPE_H_
 
+static inline int isalpha(int c)
+{
+	return (((c >= 'a') && (c <= 'z')) || ((c >= 'A') && (c <= 'Z')));
+}
+
 static inline int isdigit(int c)
 {
-	return ((c >= '0' )&&( c <= '9'));
+	return ((c >= '0') && (c <= '9'));
 }