5 files changed, 5 insertions, 5 deletions
diff --git a/libc/signal/sigaddset.c b/libc/signal/sigaddset.c
index ec1c96e9b..269f7d367 100644
--- a/libc/signal/sigaddset.c
+++ b/libc/signal/sigaddset.c
@@ -25,7 +25,7 @@
 int sigaddset ( sigset_t *set, int signo)
 {
   if (set == NULL || signo <= 0 || signo >= NSIG) {
-      errno = EINVAL;
+      __set_errno(EINVAL);
       return -1;
     }
 
diff --git a/libc/signal/sigdelset.c b/libc/signal/sigdelset.c
index daa545624..958f1d44a 100644
--- a/libc/signal/sigdelset.c
+++ b/libc/signal/sigdelset.c
@@ -23,7 +23,7 @@
 int sigdelset ( sigset_t *set, int signo)
 {
   if (set == NULL || signo <= 0 || signo >= NSIG) {
-      errno = EINVAL;
+      __set_errno(EINVAL);
       return -1;
     }
 
diff --git a/libc/signal/sigemptyset.c b/libc/signal/sigemptyset.c
index c38cb0e5a..19d8dabdf 100644
--- a/libc/signal/sigemptyset.c
+++ b/libc/signal/sigemptyset.c
@@ -25,7 +25,7 @@ int
 sigemptyset ( sigset_t *set)
 {
   if (set == NULL) {
-      errno = EINVAL;
+      __set_errno(EINVAL);
       return -1;
     }
 
diff --git a/libc/signal/sigfillset.c b/libc/signal/sigfillset.c
index 1d67f1dc5..c3ebcce4b 100644
--- a/libc/signal/sigfillset.c
+++ b/libc/signal/sigfillset.c
@@ -27,7 +27,7 @@ sigfillset (set)
 {
   if (set == NULL)
     {
-      errno = EINVAL;
+      __set_errno(EINVAL);
       return -1;
     }
 
diff --git a/libc/signal/sigismem.c b/libc/signal/sigismem.c
index 3e9b67c6c..64b14f37e 100644
--- a/libc/signal/sigismem.c
+++ b/libc/signal/sigismem.c
@@ -25,7 +25,7 @@
 int sigismember ( const sigset_t *set, int signo)
 {
   if (set == NULL || signo <= 0 || signo >= NSIG) {
-      errno=EINVAL;
+      __set_errno(EINVAL);
       return -1;
     }