diff --git a/headers/posix/math.h b/headers/posix/math.h
index a16f2fc2a8..4f28af3c1d 100644
--- a/headers/posix/math.h
+++ b/headers/posix/math.h
@@ -98,7 +98,7 @@ extern float		hypotf(float x, float y);
 extern float		ldexpf(float x, int exponent);
 extern float		lgammaf(float x);
 extern long long	llrintf(float x);
-extern long	long	llroundf(float x);
+extern long long	llroundf(float x);
 extern float		log10f(float x);
 extern float		log1pf(float x);
 extern float		logbf(float x);
@@ -136,7 +136,7 @@ extern double		gamma(double x);
 extern double		ldexp(double x, int exponent);
 extern double		lgamma(double x);
 extern long long	llrint(double x);
-extern long	long	llround(double x);
+extern long long	llround(double x);
 extern double		log(double x);
 extern double		log10(double x);
 extern long			lrint(double x);
@@ -163,7 +163,7 @@ extern long double	atan2l(long double y, long double x);
 extern long double	lgammal(long double x);
 extern long double	nearbyintl(long double x);
 extern long long	llrintl(long double x);
-extern long	long	llroundl(long double x);
+extern long long	llroundl(long double x);
 extern long			lrintl(long double x);
 extern long			lroundl(long double x);
 extern long double	remquol(long double x, long double y, int *quo);