diff --git a/sysdeps/powerpc/fpu/math_private.h b/sysdeps/powerpc/fpu/math_private.h
index 4d1e571f84..92ed872af0 100644
--- a/sysdeps/powerpc/fpu/math_private.h
+++ b/sysdeps/powerpc/fpu/math_private.h
@@ -24,11 +24,13 @@
 #include <dl-procinfo.h>
 #include <fenv_private.h>
 
+#if !defined __clang__  /* clang being confused by these constraints */
 /* Avoid putting floating point values in memory.  */
 # define math_opt_barrier(x)					\
   ({ __typeof (x) __x = (x); __asm ("" : "+dwa" (__x)); __x; })
 # define math_force_eval(x)						\
   ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "dwa" (__x)); })
+#endif /* clang */
 
 #include_next <math_private.h>