diff --git a/src/gtk/threadpsx.cpp b/src/gtk/threadpsx.cpp
index 63dc81b2c9..f4fd5908db 100644
--- a/src/gtk/threadpsx.cpp
+++ b/src/gtk/threadpsx.cpp
@@ -342,9 +342,12 @@ bool wxThread::TestDestroy()
             usleep(1);
         }
     }
+
+    // VZ: do I understand it correctly that it will terminate the thread all by
+    //     itself if it was cancelled?
     pthread_testcancel();
     
-    return TRUE; /* what is this for? */
+    return FALSE;
 }
 
 bool wxThread::IsMain()
diff --git a/src/gtk1/threadpsx.cpp b/src/gtk1/threadpsx.cpp
index 63dc81b2c9..f4fd5908db 100644
--- a/src/gtk1/threadpsx.cpp
+++ b/src/gtk1/threadpsx.cpp
@@ -342,9 +342,12 @@ bool wxThread::TestDestroy()
             usleep(1);
         }
     }
+
+    // VZ: do I understand it correctly that it will terminate the thread all by
+    //     itself if it was cancelled?
     pthread_testcancel();
     
-    return TRUE; /* what is this for? */
+    return FALSE;
 }
 
 bool wxThread::IsMain()