diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index 0ef05abd..607f2529 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -416,7 +416,7 @@ sodium_allocarray(size_t count, size_t size)
 {
     size_t total_size;
 
-    if (size >= (size_t) SIZE_MAX / count) {
+    if (count > (size_t) 0U && size >= (size_t) SIZE_MAX / count) {
         errno = ENOMEM;
         return NULL;
     }