From 06506134225f11979faa90488d4960aefdc332d7 Mon Sep 17 00:00:00 2001
From: weidel-p <philipp.weidel@intel.com>
Date: Mon, 8 May 2023 11:23:03 +0200
Subject: [PATCH] fix bug when rounding weights (#683)

---
 src/lava/utils/weightutils.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lava/utils/weightutils.py b/src/lava/utils/weightutils.py
index 009e7a29c..0230da93e 100644
--- a/src/lava/utils/weightutils.py
+++ b/src/lava/utils/weightutils.py
@@ -239,6 +239,7 @@ def truncate_weights(weights: ty.Union[np.ndarray, spmatrix],
         weights = (weights >> num_truncate_bits) << num_truncate_bits
     elif isinstance(weights, spmatrix):
         weights.data = (weights.data >> num_truncate_bits) << num_truncate_bits
+        weights.eliminate_zeros()
 
     if sign_mode == SignMode.INHIBITORY:
         weights = -weights