diff --git a/src/libc/litelibc/src/signal/sigaction.c b/src/libc/litelibc/src/signal/sigaction.c
index f7bb403536e3e47465b083d4ac56e674f66729de..45fb9c80d57618d0c04691d579ab8abc66230ae4 100644
--- a/src/libc/litelibc/src/signal/sigaction.c
+++ b/src/libc/litelibc/src/signal/sigaction.c
@@ -29,7 +29,7 @@ int __sigaction(int signum, const struct sigaction *__restrict act, struct sigac
         return -1;
     }
 
-    if (act->sa_flags == SA_SIGINFO) {
+    if (act&& (act->sa_flags == SA_SIGINFO)) {
         errno = ENOTSUP;
         return -1;
     }
diff --git a/testsuites/posixtestsuite/conformance/interfaces/sigaction/sigaction_test.c b/testsuites/posixtestsuite/conformance/interfaces/sigaction/sigaction_test.c
index 3ba80abc42e4781d285af340e4643e9abbbcbbac..697e388ad39e1e21ffeb47b9ee0fbc6ecf81daca 100644
--- a/testsuites/posixtestsuite/conformance/interfaces/sigaction/sigaction_test.c
+++ b/testsuites/posixtestsuite/conformance/interfaces/sigaction/sigaction_test.c
@@ -73,6 +73,8 @@ int TEST_sigaction_1(void)
 void *TEST_sigaction_pthread_1()
 {
     struct sigaction act;
+    sigemptyset(&act.sa_mask);
+
     act.sa_handler = TEST_sigaction_Handler1;
 
     g_signo = SIGABRT;
diff --git a/testsuites/posixtestsuite/conformance/interfaces/sigpause/3-1.c b/testsuites/posixtestsuite/conformance/interfaces/sigpause/3-1.c
index e4e0cb1eebaddeeedf5a313bc3662240426568ba..56d70dfb7cd428f2de475fdda2273923247db84c 100644
--- a/testsuites/posixtestsuite/conformance/interfaces/sigpause/3-1.c
+++ b/testsuites/posixtestsuite/conformance/interfaces/sigpause/3-1.c
@@ -71,6 +71,7 @@ int sigpause_3_1()
 {
 	pthread_t new_th;
 
+	sem = INTHREAD;
 	if(pthread_create(&new_th, NULL, a_thread_func, NULL) != 0)
 	{
 		perror("Error creating thread\n");
@@ -85,7 +86,6 @@ int sigpause_3_1()
 		return PTS_UNRESOLVED;
 	}
 
-	sem = INTHREAD;
 	while (sem == INTHREAD)
 		sleep(1);