diff --git a/configure.ac b/configure.ac
index 0a7edbc1..35c42746 100644
--- a/configure.ac
+++ b/configure.ac
@@ -791,7 +791,7 @@ dnl Checks for functions and headers
 AC_FUNC_ALLOCA
 AS_IF([test "x$EMSCRIPTEN" = "x"],[
   AC_CHECK_FUNCS([arc4random arc4random_buf])
-  AC_CHECK_FUNCS([mmap mlock madvise mprotect memset_s explicit_bzero nanosleep])
+  AC_CHECK_FUNCS([mmap mlock madvise mprotect memset_s explicit_bzero explicit_memset nanosleep])
 ])
 AC_CHECK_FUNCS([posix_memalign getpid])
 
diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index 83bc04d3..007f284a 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -110,6 +110,8 @@ sodium_memzero(void *const pnt, const size_t len)
     }
 #elif defined(HAVE_EXPLICIT_BZERO)
     explicit_bzero(pnt, len);
+#elif defined(HAVE_EXPLICIT_MEMSET)
+    explicit_memset(pnt, 0, len);
 #elif HAVE_WEAK_SYMBOLS
     memset(pnt, 0, len);
     _sodium_dummy_symbol_to_prevent_memzero_lto(pnt, len);