diff --git a/targets/f7/api_symbols.csv b/targets/f7/api_symbols.csv
index 2e4ac8794..6d0d04f4d 100644
--- a/targets/f7/api_symbols.csv
+++ b/targets/f7/api_symbols.csv
@@ -3124,7 +3124,7 @@ Function,-,strtod_l,double,"const char*, char**, locale_t"
 Function,+,strtof,float,"const char*, char**"
 Function,-,strtof_l,float,"const char*, char**, locale_t"
 Function,+,strtok,char*,"char*, const char*"
-Function,-,strtok_r,char*,"char*, const char*, char**"
+Function,+,strtok_r,char*,"char*, const char*, char**"
 Function,+,strtol,long,"const char*, char**, int"
 Function,-,strtol_l,long,"const char*, char**, int, locale_t"
 Function,-,strtold,long double,"const char*, char**"