diff --git a/src/xcb_io.c b/src/xcb_io.c
index d800a8e1..fd33f438 100644
--- a/src/xcb_io.c
+++ b/src/xcb_io.c
@@ -32,8 +32,12 @@
 
 #define throw_thread_fail_assert(_message, _var) { \
 	fprintf(stderr, "[xcb] " _message "\n"); \
-	fprintf(stderr, "[xcb] Most likely this is a multi-threaded client " \
-	                "and XInitThreads has not been called\n"); \
+        if (_Xglobal_lock) { \
+            fprintf(stderr, "[xcb] You called XInitThreads, this is not your fault\n"); \
+        } else { \
+            fprintf(stderr, "[xcb] Most likely this is a multi-threaded client " \
+                            "and XInitThreads has not been called\n"); \
+        } \
 	xcb_fail_assert(_message, _var); \
 }