diff --git a/programs/develop/ktcc/trunk/libc.obj/source/libc.c b/programs/develop/ktcc/trunk/libc.obj/source/libc.c
index 80e010e259..80e154c874 100644
--- a/programs/develop/ktcc/trunk/libc.obj/source/libc.c
+++ b/programs/develop/ktcc/trunk/libc.obj/source/libc.c
@@ -137,6 +137,8 @@ __asm__(
     ".include \"math/pow2.s\"\n\t"
     ".include \"math/pow10.s\"\n\t"
     ".include \"math/sqrt.s\"\n\t"
+    ".include \"math/sin.s\"\n\t"
+    ".include \"math/tan.s\"\n\t"
 );
 
 __asm__(
diff --git a/programs/develop/ktcc/trunk/libc.obj/source/math/sin.s b/programs/develop/ktcc/trunk/libc.obj/source/math/sin.s
index 75cc57d05f..10e5c22973 100644
--- a/programs/develop/ktcc/trunk/libc.obj/source/math/sin.s
+++ b/programs/develop/ktcc/trunk/libc.obj/source/math/sin.s
@@ -12,7 +12,7 @@ sin:
 	sahf
 	jnp	sin.L1
 	fstp	%st(0)
-	fldl	L0
+	fldl	sin.L0
 sin.L1:
 	ret	
 
diff --git a/programs/develop/ktcc/trunk/libc.obj/source/symbols.txt b/programs/develop/ktcc/trunk/libc.obj/source/symbols.txt
index 23da64f3a5..0960f43c8b 100644
--- a/programs/develop/ktcc/trunk/libc.obj/source/symbols.txt
+++ b/programs/develop/ktcc/trunk/libc.obj/source/symbols.txt
@@ -128,6 +128,8 @@ atan
 atan2
 ceil
 cos
+sin
+tan
 exp
 fabs
 floor