Fix attempts to detect Windows using _WIN32

1 files changed, 1 insertions, 1 deletions

diff --git a/src/afc.c b/src/afc.c
index 1b4070b..d9b35b7 100644
--- a/src/afc.c
+++ b/src/afc.c
@@ -338,7 +338,7 @@ static afc_error_t afc_receive_data(afc_client_t client, char **bytes, uint32_t
                 free(buf);
 
                 debug_info("WARNING: Unknown operation code received 0x%llx param1=%lld", header.operation, param1);
-#ifndef WIN32
+#ifndef _WIN32
                 fprintf(stderr, "%s: WARNING: Unknown operation code received 0x%llx param1=%lld", __func__, (long long)header.operation, (long long)param1);
 #endif