diff --git a/docs/examples/rtsp.c b/docs/examples/rtsp.c
index 3035e3fbc..32084e9ef 100644
--- a/docs/examples/rtsp.c
+++ b/docs/examples/rtsp.c
@@ -63,13 +63,13 @@ static int _getch(void)
 /* error handling macros */
 #define my_curl_easy_setopt(A, B, C)                             \
   res = curl_easy_setopt((A), (B), (C));                         \
-  if(!res)                                                       \
+  if(res != CURLE_OK)                                            \
     fprintf(stderr, "curl_easy_setopt(%s, %s, %s) failed: %d\n", \
             #A, #B, #C, res);
 
 #define my_curl_easy_perform(A)                                     \
   res = curl_easy_perform(A);                                       \
-  if(!res)                                                          \
+  if(res != CURLE_OK)                                               \
     fprintf(stderr, "curl_easy_perform(%s) failed: %d\n", #A, res);