diff --git a/newlib/libm/common/math_config.h b/newlib/libm/common/math_config.h
index 1a2d0f639..3be7e6320 100644
--- a/newlib/libm/common/math_config.h
+++ b/newlib/libm/common/math_config.h
@@ -36,7 +36,9 @@
 /* Correct special case results in non-nearest rounding modes.  */
 # define WANT_ROUNDING 1
 #endif
-#ifndef WANT_ERRNO
+#ifdef _IEEE_LIBM
+# define WANT_ERRNO 0
+#else
 /* Set errno according to ISO C with (math_errhandling & MATH_ERRNO) != 0.  */
 # define WANT_ERRNO 1
 #endif