diff --git a/main.c b/main.c
index b72e11c..b584942 100644
--- a/main.c
+++ b/main.c
@@ -825,7 +825,7 @@ void *qtb_calloc(size_t n, size_t size) {
 
 void *qtb_realloc(void *ptr, size_t size) {
     void *new_ptr = realloc(ptr, size);
-    if (!new_ptr) {
+    if (size != 0 && !new_ptr) {
         qtb_log("error: out of memory");
         qtb_exit_with_status(ERROR_MEMORY);
     }