diff --git a/src/math/lgamma.c b/src/math/lgamma.c
index d8b85312b82494b8afcedc41c20590ee96a7ae78..e25ec8e600e149fa205802a4da49704a8bb4a3e6 100644
--- a/src/math/lgamma.c
+++ b/src/math/lgamma.c
@@ -1,4 +1,4 @@
-#include "libm.h"
+#include <math.h>
 
 extern int __signgam;
 double __lgamma_r(double, int *);
@@ -7,6 +7,3 @@ double lgamma(double x)
 {
 	return __lgamma_r(x, &__signgam);
 }
-
-// FIXME
-//weak_alias(lgamma, gamma);
diff --git a/src/math/lgammaf.c b/src/math/lgammaf.c
index b3d996cf29ec42e810f549e4369bb20915ab9e4b..badb6dfec927c1fdf00a654bc088590d68002d60 100644
--- a/src/math/lgammaf.c
+++ b/src/math/lgammaf.c
@@ -1,4 +1,4 @@
-#include "libm.h"
+#include <math.h>
 
 extern int __signgam;
 float __lgammaf_r(float, int *);
@@ -7,6 +7,3 @@ float lgammaf(float x)
 {
 	return __lgammaf_r(x, &__signgam);
 }
-
-// FIXME
-//weak_alias(lgammaf, gammaf);
diff --git a/src/math/lgammal.c b/src/math/lgammal.c
index 8fae1be81d0b09a6d7bf77c75a9ce53135545618..56d7866d53077ce6d31e24742f2acded73e06e54 100644
--- a/src/math/lgammal.c
+++ b/src/math/lgammal.c
@@ -89,6 +89,8 @@
 #include "libm.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);