4 files changed, 3 insertions, 12 deletions
diff --git a/src/math/lgamma.c b/src/math/lgamma.c
index e25ec8e6..2fc9b478 100644
--- a/src/math/lgamma.c
+++ b/src/math/lgamma.c
@@ -1,7 +1,5 @@
 #include <math.h>
-
-extern int __signgam;
-double __lgamma_r(double, int *);
+#include "libm.h"
 
 double lgamma(double x)
 {
diff --git a/src/math/lgammaf.c b/src/math/lgammaf.c
index badb6dfe..2ae051d0 100644
--- a/src/math/lgammaf.c
+++ b/src/math/lgammaf.c
@@ -1,7 +1,5 @@
 #include <math.h>
-
-extern int __signgam;
-float __lgammaf_r(float, int *);
+#include "libm.h"
 
 float lgammaf(float x)
 {
diff --git a/src/math/lgammal.c b/src/math/lgammal.c
index 2b354a7c..8c798123 100644
--- a/src/math/lgammal.c
+++ b/src/math/lgammal.c
@@ -90,8 +90,6 @@
 #include "libc.h"
 
 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
-double __lgamma_r(double x, int *sg);
-
 long double __lgammal_r(long double x, int *sg)
 {
 	return __lgamma_r(x, sg);
@@ -342,16 +340,12 @@ long double __lgammal_r(long double x, int *sg) {
 }
 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
 // TODO: broken implementation to make things compile
-double __lgamma_r(double x, int *sg);
-
 long double __lgammal_r(long double x, int *sg)
 {
 	return __lgamma_r(x, sg);
 }
 #endif
 
-extern int __signgam;
-
 long double lgammal(long double x)
 {
 	return __lgammal_r(x, &__signgam);
diff --git a/src/math/signgam.c b/src/math/signgam.c
index cd728001..b4903a58 100644
--- a/src/math/signgam.c
+++ b/src/math/signgam.c
@@ -1,4 +1,5 @@
 #include <math.h>
+#include "libm.h"
 #include "libc.h"
 
 int __signgam = 0;