diff --git a/source/third_party/mongoose/mongoose.cpp b/source/third_party/mongoose/mongoose.cpp
index a4ad1a82f1..c31c42b83e 100644
--- a/source/third_party/mongoose/mongoose.cpp
+++ b/source/third_party/mongoose/mongoose.cpp
@@ -621,7 +621,7 @@ const char *mg_version(void) {
   return MONGOOSE_VERSION;
 }
 
-static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
+static void mg_strlcpy(char *dst, const char *src, size_t n) {
   for (; *src != '\0' && n > 1; n--) {
     *dst++ = *src++;
   }