diff --git a/headers/posix/stdlib.h b/headers/posix/stdlib.h
index 1dfdbde12c..20715bd7a9 100644
--- a/headers/posix/stdlib.h
+++ b/headers/posix/stdlib.h
@@ -89,6 +89,7 @@ extern unsigned int 	atoui(const char *string);
 extern unsigned long	atoul(const char *string);
 
 extern double			strtod(const char *string, char **end);
+extern float			strtof(const char *string, char **end);
 extern long				strtol(const char *string, char **end, int base);
 extern unsigned long	strtoul(const char *string, char **end, int base);
 extern long long		strtoll(const char *string, char **end, int base);