diff --git a/include/tlibc/string/str.h b/include/tlibc/string/str.h
index cc10f92..bad3717 100755
--- a/include/tlibc/string/str.h
+++ b/include/tlibc/string/str.h
@@ -13,7 +13,13 @@ typedef struct str {
     bool isZeroTerminated;
 } str;
 
+/*
+USAGE:
+str s = STR("something");
+printf(FMT_str"\n", str_expand(s));
+*/
 #define FMT_str "%.*s"
+#define str_expand(s) s.len, s.data
 
 /// creates str from a string literal
 #define STR(LITERAL) str_construct(LITERAL, ARRAY_LEN(LITERAL) - 1, true)