1 files changed, 3 insertions, 3 deletions
diff --git a/libm/s_fmax.c b/libm/s_fmax.c
index 21dfaa981..5f29ad8e3 100644
--- a/libm/s_fmax.c
+++ b/libm/s_fmax.c
@@ -9,10 +9,10 @@
 
 double fmax(double x, double y)
 {
-  if (__fpclassify(x) == FP_NAN)
-    return x;
-  if (__fpclassify(y) == FP_NAN)
+  if (isnan(x))
     return y;
+  if (isnan(y))
+    return x;
 
   return x > y ? x : y;
 }