diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c
index 25194e8..d2b2c39 100644
--- a/src/backend/commands/analyze.c
+++ b/src/backend/commands/analyze.c
@@ -493,7 +493,7 @@ do_analyze_rel(Relation onerel, int options, VacuumParams *params,
 				thisdata->vacattrstats = (VacAttrStats **)
 					palloc(indexInfo->ii_NumIndexAttrs * sizeof(VacAttrStats *));
 				tcnt = 0;
-				for (i = 0; i < indexInfo->ii_NumIndexAttrs; i++)
+				for (i = 0; i < indexInfo->ii_NumIndexKeyAttrs; i++)
 				{
 					int			keycol = indexInfo->ii_IndexAttrNumbers[i];