fix fdim in tgmath.h

diff --git a/include/tgmath.h b/include/tgmath.h
index 09edf49..6926d0f 100644 (file)
--- a/include/tgmath.h
+++ b/include/tgmath.h
@@ -105,7 +105,7 @@ without __GNUC__ the return type is always long double [complex]
 #define exp2(x)         __tg_real(exp2, (x))
 #define expm1(x)        __tg_real(expm1, (x))
 #define fabs(x)         __tg_real_complex_fabs(x)
-#define fdim(x)         __tg_real(fdim, (x))
+#define fdim(x,y)       __tg_real_2(fdim, (x), (y))
 #define floor(x)        __tg_real(floor, (x))
 #define fma(x,y,z)      __tg_real_fma((x), (y), (z))
 #define fmax(x,y)       __tg_real_2(fmax, (x), (y))