diff --git a/dist-build/emscripten-symbols.def b/dist-build/emscripten-symbols.def
index 9558a886..8ac770c3 100644
--- a/dist-build/emscripten-symbols.def
+++ b/dist-build/emscripten-symbols.def
@@ -487,7 +487,6 @@ _randombytes_set_implementation 0 0
 _randombytes_stir 1 1
 _randombytes_uniform 1 1
 _sodium_add 0 0
-_sodium_alloc_overhead 0 0
 _sodium_allocarray 0 0
 _sodium_bin2hex 1 1
 _sodium_compare 0 0
diff --git a/src/libsodium/include/sodium/utils.h b/src/libsodium/include/sodium/utils.h
index 4586cc2a..0a7aadb4 100644
--- a/src/libsodium/include/sodium/utils.h
+++ b/src/libsodium/include/sodium/utils.h
@@ -120,9 +120,6 @@ int sodium_mprotect_readonly(void *ptr);
 SODIUM_EXPORT
 int sodium_mprotect_readwrite(void *ptr);
 
-SODIUM_EXPORT
-size_t sodium_alloc_overhead(size_t size);
-
 /* -------- */
 
 int _sodium_alloc_init(void);
diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index 8ef2e630..bff6e359 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -702,13 +702,3 @@ sodium_mprotect_readwrite(void *ptr)
 {
     return _sodium_mprotect(ptr, _mprotect_readwrite);
 }
-
-size_t
-sodium_alloc_overhead(size_t size)
-{
-#ifndef HAVE_ALIGNED_MALLOC
-    return unprotected_size == (size_t) 0U;
-#else
-    return _page_round((sizeof canary) + size) + page_size * (size_t) 3U;
-#endif
-}
diff --git a/test/default/sodium_utils3.c b/test/default/sodium_utils3.c
index 4bd7eb5a..3f2b600e 100644
--- a/test/default/sodium_utils3.c
+++ b/test/default/sodium_utils3.c
@@ -37,9 +37,6 @@ main(void)
     void * buf;
     size_t size;
 
-    assert(sodium_alloc_overhead((size_t) 0U) !=
-           sodium_alloc_overhead((size_t) 65537U));
-
 #ifdef SIGSEGV
     signal(SIGSEGV, segv_handler);
 #endif