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-rw-r--r--math/w_exp2.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/w_exp2.c b/math/w_exp2.c
index b5d8e25702..02820be373 100644
--- a/math/w_exp2.c
+++ b/math/w_exp2.c
@@ -9,7 +9,7 @@ double
 __exp2 (double x)
 {
   double z = __ieee754_exp2 (x);
-  if (__builtin_expect (!__finite (z), 0)
+  if (__builtin_expect (!__finite (z) || z == 0, 0)
       && __finite (x) && _LIB_VERSION != _IEEE_)
     /* exp2 overflow: 44, exp2 underflow: 45 */
     return __kernel_standard (x, x, 44 + !!__signbit (x));