diff --git a/.github/workflows/bsd.yml b/.github/workflows/bsd.yml
index 17f3b3d..02be3da 100644
--- a/.github/workflows/bsd.yml
+++ b/.github/workflows/bsd.yml
@@ -48,9 +48,9 @@ jobs:
             curl -L https://cpanmin.us | sudo perl - --notest --installdeps --with-configure --with-develop .
             perl Makefile.PL
             make
-            gcc -Wall pending_signal.c && for n in `seq 15`; do ./a.out; echo $?; done
+            gcc -Wall -xc pending_signal_c && for n in `seq 15`; do ./a.out; echo $?; done
             echo BARRIER1
-            gcc -DREBLOCK -Wall pending_signal.c && for n in `seq 15`; do ./a.out; echo $?; done
+            gcc -DREBLOCK -Wall -xc pending_signal_c && for n in `seq 15`; do ./a.out; echo $?; done
             echo BARRIER2
             ktrace -di env IPCRUNDEBUG=gory perl -Iblib/lib t/kill_kill.t || true
             kdump || true
diff --git a/pending_signal.c b/pending_signal_c
similarity index 100%
rename from pending_signal.c
rename to pending_signal_c