Index: uspace/lib/math/arch/amd64/include/libarch/math.h
===================================================================
--- uspace/lib/math/arch/amd64/include/libarch/math.h	(revision d9be488aaf4d20f1c61c594ac3595cdf66202e01)
+++ uspace/lib/math/arch/amd64/include/libarch/math.h	(revision 83b01c20c6b1089ca58ebbbee8f4d709257d1db7)
@@ -36,4 +36,11 @@
 #define LIBMATH_amd64_MATH_H_
 
+#include <mod.h>
+
+static inline double fmod(double dividend, double divisor)
+{
+	return double_mod(dividend, divisor);
+}
+
 extern double sin(double);
 extern double cos(double);