diff --git a/gpcontrib/gp_sparse_vector/SparseData.h b/gpcontrib/gp_sparse_vector/SparseData.h
index d430ce7795d..f822a46f908 100644
--- a/gpcontrib/gp_sparse_vector/SparseData.h
+++ b/gpcontrib/gp_sparse_vector/SparseData.h
@@ -284,6 +284,8 @@ static inline int64 compword_to_int8(const char *entry)
 			numptr8[6] = entry[7];
 			numptr8[7] = entry[8];
 			break;
+		default:
+			abort();
 	}
 
 	return num;