Index: uspace/lib/libc/include/ctype.h
===================================================================
--- uspace/lib/libc/include/ctype.h	(revision 4ec91b2fbbc88da298736671cc23c63ab5e8ec4c)
+++ uspace/lib/libc/include/ctype.h	(revision d0b72c45f562dfcf47a6a3ed86ad92b31c953dee)
@@ -46,7 +46,12 @@
 }
 
+static inline int isalnum(int c)
+{
+	return (isalpha(c) || isdigit(c));
+}
+
 static inline int isspace(int c)
 {
-	switch(c) {
+	switch (c) {
 	case ' ':
 	case '\n':