diff --git a/libunwind/test/configs/ibm-libunwind-shared.cfg.in b/libunwind/test/configs/ibm-libunwind-shared.cfg.in
--- a/libunwind/test/configs/ibm-libunwind-shared.cfg.in
+++ b/libunwind/test/configs/ibm-libunwind-shared.cfg.in
@@ -5,7 +5,7 @@
 
 config.substitutions.append(('%{flags}', ''))
 config.substitutions.append(('%{compile_flags}',
-    '-nostdinc++ -I %{include} -I %{cxx-include}'
+    '-nostdinc++ -I %{include}'
 ))
 config.substitutions.append(('%{link_flags}',
     '-nostdlib++ -L %{lib} -lunwind -ldl -Wl,-bbigtoc'