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-rw-r--r--math/s_ctanhf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/s_ctanhf.c b/math/s_ctanhf.c
index 1405f3f1e5..14e1371ef5 100644
--- a/math/s_ctanhf.c
+++ b/math/s_ctanhf.c
@@ -57,7 +57,7 @@ __ctanhf (__complex__ float x)
       /* tanh(x+iy) = (sinh(2x) + i*sin(2y))/(cosh(2x) + cos(2y))
 	 = (sinh(x)*cosh(x) + i*sin(y)*cos(y))/(sinh(x)^2 + cos(y)^2).  */
 
-      if (__glibc_likely (fpclassify(__imag__ x) != FP_SUBNORMAL))
+      if (__glibc_likely (fabsf (__imag__ x) > FLT_MIN))
 	{
 	  __sincosf (__imag__ x, &sinix, &cosix);
 	}