diff --git a/httplib.h b/httplib.h
index e40e7f6..c69d861 100644
--- a/httplib.h
+++ b/httplib.h
@@ -4547,6 +4547,7 @@ inline int getaddrinfo_with_timeout(const char *node, const char *service,
 
   return ret;
 #elif TARGET_OS_MAC
+  if (!node) { return EAI_NONAME; }
   // macOS implementation using CFHost API for asynchronous DNS resolution
   CFStringRef hostname_ref = CFStringCreateWithCString(
       kCFAllocatorDefault, node, kCFStringEncodingUTF8);