diff --git a/libc/calls/struct/sigset.h b/libc/calls/struct/sigset.h
index 3d783c47a..09faa3118 100644
--- a/libc/calls/struct/sigset.h
+++ b/libc/calls/struct/sigset.h
@@ -4,19 +4,21 @@ COSMOPOLITAN_C_START_
 
 typedef uint64_t sigset_t;
 
-int sigaddset(sigset_t *, int) paramsnonnull();
-int sigdelset(sigset_t *, int) paramsnonnull();
-int sigemptyset(sigset_t *) paramsnonnull();
-int sigfillset(sigset_t *) paramsnonnull();
-int sigandset(sigset_t *, const sigset_t *, const sigset_t *) paramsnonnull();
-int sigorset(sigset_t *, const sigset_t *, const sigset_t *) paramsnonnull();
-int sigisemptyset(const sigset_t *) paramsnonnull() nosideeffect;
-int sigismember(const sigset_t *, int) paramsnonnull() nosideeffect;
-int sigcountset(const sigset_t *) paramsnonnull() nosideeffect;
-int sigprocmask(int, const sigset_t *, sigset_t *);
-int sigsuspend(const sigset_t *);
-int sigpending(sigset_t *);
-int pthread_sigmask(int, const sigset_t *, sigset_t *);
+/* clang-format off */
+int sigaddset(sigset_t *, int) libcesque paramsnonnull();
+int sigdelset(sigset_t *, int) libcesque paramsnonnull();
+int sigemptyset(sigset_t *) libcesque paramsnonnull();
+int sigfillset(sigset_t *) libcesque paramsnonnull();
+int sigandset(sigset_t *, const sigset_t *, const sigset_t *) libcesque paramsnonnull();
+int sigorset(sigset_t *, const sigset_t *, const sigset_t *) libcesque paramsnonnull();
+int sigisemptyset(const sigset_t *) libcesque paramsnonnull() nosideeffect;
+int sigismember(const sigset_t *, int) libcesque paramsnonnull() nosideeffect;
+int sigcountset(const sigset_t *) libcesque paramsnonnull() nosideeffect;
+int sigprocmask(int, const sigset_t *, sigset_t *) dontthrow;
+int sigsuspend(const sigset_t *) dontthrow;
+int sigpending(sigset_t *) libcesque;
+int pthread_sigmask(int, const sigset_t *, sigset_t *) dontthrow;
+/* clang-format on */
 
 COSMOPOLITAN_C_END_
 #endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGSET_H_ */
diff --git a/libc/system/systemvpe.c b/libc/system/systemvpe.c
index e44ed8d66..1165d45c3 100644
--- a/libc/system/systemvpe.c
+++ b/libc/system/systemvpe.c
@@ -52,9 +52,8 @@ int systemvpe(const char *prog, char *const argv[], char *const envp[]) {
   int pid, wstatus;
   char pathbuf[PATH_MAX + 1];
   sigset_t chldmask, savemask;
-  if (!(exe = commandv(prog, pathbuf, sizeof(pathbuf)))) {
+  if (!(exe = commandv(prog, pathbuf, sizeof(pathbuf))))
     return -1;
-  }
   sigemptyset(&chldmask);
   sigaddset(&chldmask, SIGINT);
   sigaddset(&chldmask, SIGQUIT);
@@ -62,7 +61,7 @@ int systemvpe(const char *prog, char *const argv[], char *const envp[]) {
   sigprocmask(SIG_BLOCK, &chldmask, &savemask);
   if (!(pid = vfork())) {
     sigprocmask(SIG_SETMASK, &savemask, 0);
-    execve(prog, argv, envp);
+    execve(exe, argv, envp);
     _Exit(127);
   } else if (pid == -1) {
     wstatus = -1;
diff --git a/test/libc/system/BUILD.mk b/test/libc/system/BUILD.mk
index 0e1545776..ef1a6036d 100644
--- a/test/libc/system/BUILD.mk
+++ b/test/libc/system/BUILD.mk
@@ -94,6 +94,17 @@ o/$(MODE)/test/libc/system/trace_test.dbg:			\
 		$(APE_NO_MODIFY_SELF)
 	@$(APELINK)
 
+o/$(MODE)/test/libc/system/systemvpe_test.dbg:			\
+		$(TEST_LIBC_SYSTEM_DEPS)			\
+		o/$(MODE)/test/libc/system/systemvpe_test.o	\
+		o/$(MODE)/test/libc/system/system.pkg		\
+		o/$(MODE)/test/libc/proc/life.zip.o		\
+		$(LIBC_TESTMAIN)				\
+		$(CRT)						\
+		$(APE_NO_MODIFY_SELF)
+	@$(APELINK)
+
+
 o/$(MODE)/test/libc/system/popen_test.zip.o: private ZIPOBJ_FLAGS += -B
 o/$(MODE)/test/libc/system/popen_test.dbg.zip.o: private ZIPOBJ_FLAGS += -B
 
diff --git a/test/libc/system/systemvpe_test.c b/test/libc/system/systemvpe_test.c
new file mode 100644
index 000000000..bcbc5a30c
--- /dev/null
+++ b/test/libc/system/systemvpe_test.c
@@ -0,0 +1,34 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2024 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/calls.h"
+#include "libc/cosmo.h"
+#include "libc/runtime/runtime.h"
+#include "libc/testlib/testlib.h"
+
+void SetUpOnce(void) {
+  testlib_enable_tmp_setup_teardown();
+}
+
+TEST(systemvpe, test) {
+  ASSERT_SYS(0, 0, mkdir("bin", 0755));
+  ASSERT_SYS(0, 0, setenv("PATH", "bin", true));
+  testlib_extract("/zip/life", "bin/life", 0755);
+  ASSERT_SYS(0, 42 << 8,
+             systemvpe("life", (char *[]){"life", 0}, (char *[]){0}));
+}