diff --git a/libretro-common/include/string/stdstring.h b/libretro-common/include/string/stdstring.h
index 1217de9b4b..ce40cc24c3 100644
--- a/libretro-common/include/string/stdstring.h
+++ b/libretro-common/include/string/stdstring.h
@@ -36,6 +36,8 @@ bool string_is_empty(const char *data);
 
 char *string_to_upper(char *s);
 
+char *string_to_lower(char *s);
+
 char *string_replace_substring(const char *in, const char *pattern,
       const char *by);
 
diff --git a/libretro-common/string/stdstring.c b/libretro-common/string/stdstring.c
index b4a978d016..ffe099d44a 100644
--- a/libretro-common/string/stdstring.c
+++ b/libretro-common/string/stdstring.c
@@ -45,6 +45,14 @@ char *string_to_upper(char *s)
    return s;
 }
 
+char *string_to_lower(char *s)
+{
+   unsigned char *ucs = (unsigned char *)s;
+   for ( ; *ucs != '\0'; ucs++)
+      *ucs = tolower(*ucs);
+   return s;
+}
+
 char *string_replace_substring(const char *in, const char *pattern, const char *replacement)
 {
    char *needle           = NULL;