diff --git a/src/math/__signbit.c b/src/math/__signbit.c
index ffe717ce6aafa0481110ec5bc7d0754a2507afa4..e700b6b75fcb91e1919ad64b7da4e8c6a16f6065 100644
--- a/src/math/__signbit.c
+++ b/src/math/__signbit.c
@@ -1,6 +1,6 @@
 #include "libm.h"
 
-// FIXME: macro
+// FIXME: macro in math.h
 int __signbit(double x)
 {
 	union {
diff --git a/src/math/__signbitf.c b/src/math/__signbitf.c
index ff3e81ffd7113d699a8931e08babee7ffc30829f..40ad3cfd0cbe6e4d420df2c8b3f9355bf4152cd5 100644
--- a/src/math/__signbitf.c
+++ b/src/math/__signbitf.c
@@ -1,6 +1,6 @@
 #include "libm.h"
 
-// FIXME
+// FIXME: macro in math.h
 int __signbitf(float x)
 {
 	union {
diff --git a/src/math/remquo.c b/src/math/remquo.c
index 79c9a55e02afa85b55660233ab93a41147b09c6c..e92984edf2ec018bdc801738ea9e578047d4ff7c 100644
--- a/src/math/remquo.c
+++ b/src/math/remquo.c
@@ -35,7 +35,6 @@ double remquo(double x, double y, int *quo)
 	hy &= 0x7fffffff;       /* |y| */
 
 	/* purge off exception values */
-	// FIXME: signed shift
 	if ((hy|ly) == 0 || hx >= 0x7ff00000 ||  /* y = 0, or x not finite */
 	    (hy|((ly|-ly)>>31)) > 0x7ff00000)    /* or y is NaN */
 		return (x*y)/(x*y);