diff --git a/src/sparsevec.c b/src/sparsevec.c
index 6f6d73f..6c1949f 100644
--- a/src/sparsevec.c
+++ b/src/sparsevec.c
@@ -899,7 +899,7 @@ sparsevec_l2_normalize(PG_FUNCTION_ARGS)
 					continue;
 
 				/* Safety check */
-				if (j == newResult->nnz)
+				if (j >= newResult->nnz)
 					elog(ERROR, "safety check failed");
 
 				newResult->indices[j] = result->indices[i];