diff --git a/src/include/access/gist.h b/src/include/access/gist.h
index e49a988176d0003f807f2dffe11c7fe086238e52..1fc4a7112b0671c5281a083b0a42eaefe99133f4 100644
--- a/src/include/access/gist.h
+++ b/src/include/access/gist.h
@@ -24,9 +24,16 @@
 /* 
 ** You can have as many strategies as you please in GiSTs, as
 ** long as your consistent method can handle them
-*/
+**
+** But strat.h->StrategyEvaluationData->StrategyExpression  expression[12]
+** - so 12 is real max # of strategies, or StrategyEvaluationIsValid
+** crashes backend...		- vadim 05/21/97
+
 #define GISTNStrategies			100
 
+*/
+#define GISTNStrategies			12
+
 /*
 ** Helper routines
 */