diff --git a/.github/workflows/benchmark.yaml b/.github/workflows/benchmark.yaml
index 6742b2e..ee2bce5 100644
--- a/.github/workflows/benchmark.yaml
+++ b/.github/workflows/benchmark.yaml
@@ -11,7 +11,7 @@ jobs:
     - name: take benchmarks
       run: |
         mkdir -p document
-        ./benchmark/gendoc.sh ${{ github.event.issue.number }} | tee document/Benchmarks.md
+        ./benchmark/gendoc.sh ${{ github.event.number }} | tee document/Benchmarks.md
     - name: upload to wiki
       uses: SwiftDocOrg/github-wiki-publish-action@v1
       with:
diff --git a/benchmark/gendoc.sh b/benchmark/gendoc.sh
index 5bebc74..bc0fe11 100755
--- a/benchmark/gendoc.sh
+++ b/benchmark/gendoc.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-COMMIT="$1"
+PRNUM="$1"
 TARGETS="i386-linux-handwritten c python"
 TIMEFORMAT='%U'
 CPU_MODEL=`cat /proc/cpuinfo | grep -m1 'model name' | cut -d: -f2 | sed "s/^ *//g"`
@@ -36,7 +36,7 @@ function generate-table {
 
 echo "# Environment"
 echo
-echo "- Commit: $COMMIT"
+echo "- Pull Request: #$PRNUM"
 echo "- $CPU_MODEL"
 echo "- $MEM_SIZE"
 echo "- $UNAME"