diff --git a/libunwind/test/signal_frame.pass.cpp b/libunwind/test/signal_frame.pass.cpp
--- a/libunwind/test/signal_frame.pass.cpp
+++ b/libunwind/test/signal_frame.pass.cpp
@@ -15,7 +15,7 @@
 // TODO: Investigate this failure on macOS
 // XFAIL: target={{.+}}-apple-darwin{{.+}}
 
-// UNSUPPORTED: libunwind-arm-ehabi
+// UNSUPPORTED: libunwind-arm-ehabi, target=powerpc{{|64}}-ibm-aix
 
 #include <assert.h>
 #include <stdlib.h>