diff --git a/libs/pbd/wscript b/libs/pbd/wscript
index 27617adfa9..7d8155c712 100644
--- a/libs/pbd/wscript
+++ b/libs/pbd/wscript
@@ -96,7 +96,8 @@ def configure(conf):
     conf.check(function_name='getmntent', header_name='mntent.h', define_name='HAVE_GETMNTENT',mandatory=False)
     conf.check(header_name='execinfo.h', define_name='HAVE_EXECINFO',mandatory=False)
     conf.check(header_name='unistd.h', define_name='HAVE_UNISTD',mandatory=False)
-    conf.check_cc(function_name='posix_memalign', header_name='stdlib.h', cflags='-D_XOPEN_SOURCE=600', define_name='HAVE_POSIX_MEMALIGN', mandatory=False)
+    if not Options.options.ppc:
+        conf.check_cc(function_name='posix_memalign', header_name='stdlib.h', cflags='-D_XOPEN_SOURCE=600', define_name='HAVE_POSIX_MEMALIGN', mandatory=False)
     conf.check(function_name='localtime_r', header_name='time.h', define_name='HAVE_LOCALTIME_R',mandatory=False)
 
     conf.write_config_header('libpbd-config.h', remove=False)