diff --git a/tools/generate-flamegraph.sh b/tools/generate-flamegraph.sh
index 7953b9db6f1e3344cffaa14de1610375f59c6bbb..a84ed0f63b293121e2cfb7a64815d089046d401d 100755
--- a/tools/generate-flamegraph.sh
+++ b/tools/generate-flamegraph.sh
@@ -30,7 +30,8 @@ pushd "${TMPDIR}" > /dev/null
 ${PERF} script -i "${PERF_DATA}" > out.perf
 "${SCRIPTDIR}"/stackcollapse-perf.pl out.perf > out.folded
 sed -e 's/^EMPER_Wrkr_#[0-9]\+;//' out.folded > out.folded.filtered
-"${SCRIPTDIR}"/flamegraph.pl out.folded.filtered > flame.svg
+sed -e 's/^iou-wrk-[0-9]\+;//' out.folded.filtered > out.folded.filtered.2
+"${SCRIPTDIR}"/flamegraph.pl out.folded.filtered.2 > flame.svg
 
 popd >/dev/null