diff --git a/lib/Analysis/GRExprEngine.cpp b/lib/Analysis/GRExprEngine.cpp
index a930333..a544b01 100644
--- a/lib/Analysis/GRExprEngine.cpp
+++ b/lib/Analysis/GRExprEngine.cpp
@@ -1202,7 +1202,9 @@
             break;
             
           case 14:
-            if (!memcmp(s, "dtrace_assfail", 14)) Builder->BuildSinks = true;
+            if (!memcmp(s, "dtrace_assfail", 14) ||
+                !memcmp(s, "yy_fatal_error", 14))
+              Builder->BuildSinks = true;
             break;
             
           case 26: