diff --git a/openwrt/toolchain/libnotimpl/files/math.c b/openwrt/toolchain/libnotimpl/files/math.c
index a16ea740e..7333a36a2 100644
--- a/openwrt/toolchain/libnotimpl/files/math.c
+++ b/openwrt/toolchain/libnotimpl/files/math.c
@@ -43,7 +43,7 @@
 #ifdef __STDC__
 	float ceilf(float x)
 #else
-	float rintf(x)
+	float ceilf(x)
 	float x;
 #endif
 {
@@ -63,6 +63,6 @@
 	float x;
 #endif
 {
-	return (float) sin( (double)x );
+	return (float) rint( (double)x );
 }