diff --git a/.gitea/workflows/test.yml b/.gitea/workflows/test.yml
index cf503b47..b186179b 100644
--- a/.gitea/workflows/test.yml
+++ b/.gitea/workflows/test.yml
@@ -810,6 +810,24 @@ jobs:
           echo ""
         done
 
+  test_reweight_half:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_reweight_half.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_heal_csum_32k_dmj:
     runs-on: ubuntu-latest
     needs: build
diff --git a/mon/osd_tree.js b/mon/osd_tree.js
index b2182cce..5ce6d0dd 100644
--- a/mon/osd_tree.js
+++ b/mon/osd_tree.js
@@ -15,7 +15,7 @@ function get_osd_tree(global_config, state)
         const stat = state.osd.stats[osd_num];
         const osd_cfg = state.config.osd[osd_num];
         let reweight = osd_cfg == null ? 1 : Number(osd_cfg.reweight);
-        if (isNaN(reweight) || reweight < 0 || reweight > 0)
+        if (isNaN(reweight) || reweight < 0 || reweight > 1)
             reweight = 1;
         if (stat && stat.size && reweight && (state.osd.state[osd_num] || Number(stat.time) >= down_time ||
             osd_cfg && osd_cfg.noout))
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index 734d3858..25221680 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -70,6 +70,8 @@ TEST_NAME=local_read POOLCFG='"local_reads":"random",' ./test_heal.sh
 SCHEME=ec ./test_heal.sh
 ANTIETCD=1 ./test_heal.sh
 
+./test_reweight_half.sh
+
 TEST_NAME=csum_32k_dmj OSD_ARGS="--data_csum_type crc32c --csum_block_size 32k --inmemory_metadata false --inmemory_journal false" OFFSET_ARGS=$OSD_ARGS ./test_heal.sh
 TEST_NAME=csum_32k_dj  OSD_ARGS="--data_csum_type crc32c --csum_block_size 32k --inmemory_journal false" OFFSET_ARGS=$OSD_ARGS ./test_heal.sh
 TEST_NAME=csum_32k     OSD_ARGS="--data_csum_type crc32c --csum_block_size 32k" OFFSET_ARGS=$OSD_ARGS ./test_heal.sh
diff --git a/tests/test_reweight_half.sh b/tests/test_reweight_half.sh
new file mode 100755
index 00000000..6c007f06
--- /dev/null
+++ b/tests/test_reweight_half.sh
@@ -0,0 +1,41 @@
+#!/bin/bash -ex
+
+. `dirname $0`/common.sh
+
+node mon/mon-main.js $MON_PARAMS --etcd_address $ETCD_URL --etcd_prefix "/vitastor" >>./testdata/mon.log 2>&1 &
+MON_PID=$!
+wait_etcd
+
+TIME=$(date '+%s')
+$ETCDCTL put /vitastor/osd/stats/1 '{"host":"host1","size":1073741824,"time":"'$TIME'"}'
+$ETCDCTL put /vitastor/osd/stats/2 '{"host":"host1","size":1073741824,"time":"'$TIME'"}'
+$ETCDCTL put /vitastor/osd/stats/3 '{"host":"host2","size":1073741824,"time":"'$TIME'"}'
+$ETCDCTL put /vitastor/osd/stats/4 '{"host":"host2","size":1073741824,"time":"'$TIME'"}'
+build/src/cmd/vitastor-cli --etcd_address $ETCD_URL create-pool testpool -s 2 -n 16 --force
+
+sleep 2
+
+# check that all OSDs have 8 PGs
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 1 or .[1] == 1) ] | length) == 8'
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 2 or .[1] == 2) ] | length) == 8'
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 3 or .[1] == 3) ] | length) == 8'
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 4 or .[1] == 4) ] | length) == 8'
+
+build/src/cmd/vitastor-cli --etcd_address $ETCD_URL modify-osd --reweight 0.5 3
+
+sleep 2
+
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 1 or .[1] == 1) ] | length) == 8'
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 2 or .[1] == 2) ] | length) == 8'
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 3 or .[1] == 3) ] | length) <= 6'
+$ETCDCTL get /vitastor/pg/config --print-value-only | \
+    jq -s -e '([ .[0].items["1"] | .[].osd_set | map_values(. | tonumber) | select(.[0] == 4 or .[1] == 4) ] | length) >= 10'
+
+format_green OK