diff --git a/headers/posix/math.h b/headers/posix/math.h
index 2aa3e9cfd3..789aff023d 100644
--- a/headers/posix/math.h
+++ b/headers/posix/math.h
@@ -234,7 +234,7 @@ extern long double	fmal(long double x, long double y, long double z);
 extern long double	fmaxl(long double x, long double y);
 extern long double	fminl(long double x, long double y);
 extern long double	fmodl(long double x, long double y);
-extern long double	frexpl(long double num, int *exp);
+extern long double	frexpl(long double num, int *_exponent);
 extern long double	hypotl(long double x, long double y);
 extern int			ilogbl(long double x);
 extern long double	ldexpl(long double x, int exponent);
diff --git a/headers/posix/signal.h b/headers/posix/signal.h
index c43aef770a..7415cfe99c 100644
--- a/headers/posix/signal.h
+++ b/headers/posix/signal.h
@@ -225,29 +225,29 @@ extern "C" {
 
 
 /* signal management (actions and block masks) */
-__sighandler_t signal(int signal, __sighandler_t signalHandler);
-int     sigaction(int signal, const struct sigaction* action,
+__sighandler_t signal(int _signal, __sighandler_t signalHandler);
+int     sigaction(int _signal, const struct sigaction* action,
 			struct sigaction* oldAction);
-__sighandler_t sigset(int signal, __sighandler_t signalHandler);
-int		sigignore(int signal);
-int		siginterrupt(int signal, int flag);
+__sighandler_t sigset(int _signal, __sighandler_t signalHandler);
+int		sigignore(int _signal);
+int		siginterrupt(int _signal, int flag);
 
 int     sigprocmask(int how, const sigset_t* set, sigset_t* oldSet);
 int		pthread_sigmask(int how, const sigset_t* set, sigset_t* oldSet);
-int		sighold(int signal);
-int		sigrelse(int signal);
+int		sighold(int _signal);
+int		sigrelse(int _signal);
 
 /* sending signals */
-int     raise(int signal);
-int     kill(pid_t pid, int signal);
-int		killpg(pid_t processGroupID, int signal);
-int		sigqueue(pid_t pid, int signal, const union sigval userValue);
-int		pthread_kill(pthread_t thread, int signal);
+int     raise(int _signal);
+int     kill(pid_t pid, int _signal);
+int		killpg(pid_t processGroupID, int _signal);
+int		sigqueue(pid_t pid, int _signal, const union sigval userValue);
+int		pthread_kill(pthread_t thread, int _signal);
 
 /* querying and waiting for signals */
 int     sigpending(sigset_t* set);
 int     sigsuspend(const sigset_t* mask);
-int		sigpause(int signal);
+int		sigpause(int _signal);
 int 	sigwait(const sigset_t* set, int* _signal);
 int		sigwaitinfo(const sigset_t* set, siginfo_t* info);
 int		sigtimedwait(const sigset_t* set, siginfo_t* info,
@@ -259,13 +259,13 @@ int		sigaltstack(const stack_t* stack, stack_t* oldStack);
 /* signal set (sigset_t) manipulation */
 int     sigemptyset(sigset_t* set);
 int     sigfillset(sigset_t* set);
-int 	sigaddset(sigset_t* set, int signal);
-int 	sigdelset(sigset_t* set, int signal);
-int 	sigismember(const sigset_t* set, int signal);
+int 	sigaddset(sigset_t* set, int _signal);
+int 	sigdelset(sigset_t* set, int _signal);
+int 	sigismember(const sigset_t* set, int _signal);
 
 /* printing signal names */
 void	psiginfo(const siginfo_t* info, const char* message);
-void	psignal(int signal, const char* message);
+void	psignal(int _signal, const char* message);
 
 /* implementation private */
 int		__signal_get_sigrtmin();
diff --git a/headers/posix/time.h b/headers/posix/time.h
index 856c6d5c8b..08abda28f2 100644
--- a/headers/posix/time.h
+++ b/headers/posix/time.h
@@ -90,10 +90,10 @@ extern char 		*strptime(const char *buf, const char *format, struct tm *tm);
 
 /* clock functions */
 int		clock_getres(clockid_t clockID, struct timespec* resolution);
-int		clock_gettime(clockid_t clockID, struct timespec* time);
-int		clock_settime(clockid_t clockID, const struct timespec* time);
+int		clock_gettime(clockid_t clockID, struct timespec* _time);
+int		clock_settime(clockid_t clockID, const struct timespec* _time);
 int		clock_nanosleep(clockid_t clockID, int flags,
-			const struct timespec* time, struct timespec* remainingTime);
+			const struct timespec* _time, struct timespec* remainingTime);
 int		clock_getcpuclockid(pid_t pid, clockid_t* _clockID);
 
 /* timer functions */