diff --git a/scripts/build.c++.tests/instantiate b/scripts/build.c++.tests/instantiate
index 54ae426..7002962 100644
--- a/scripts/build.c++.tests/instantiate
+++ b/scripts/build.c++.tests/instantiate
@@ -18,7 +18,7 @@ do
     # HACK -- we need to extract the library's header name
     do_cmd export ${cname}_MONOLITHIC="1"
     do_cmd source ../${lib}/build.monolithic || exit 1
-    TEST_HEADERS="#include \"${HDR}\"\n${TEST_HEADERS}"
+    TEST_HEADERS="#include \"$(basename ${HDR})\"\n${TEST_HEADERS}"
 done
 
 do_parameter_subst TEST_LIBS LINK_LIBS TEST_HEADERS
diff --git a/scripts/build.c.tests/instantiate b/scripts/build.c.tests/instantiate
index 54ae426..7002962 100644
--- a/scripts/build.c.tests/instantiate
+++ b/scripts/build.c.tests/instantiate
@@ -18,7 +18,7 @@ do
     # HACK -- we need to extract the library's header name
     do_cmd export ${cname}_MONOLITHIC="1"
     do_cmd source ../${lib}/build.monolithic || exit 1
-    TEST_HEADERS="#include \"${HDR}\"\n${TEST_HEADERS}"
+    TEST_HEADERS="#include \"$(basename ${HDR})\"\n${TEST_HEADERS}"
 done
 
 do_parameter_subst TEST_LIBS LINK_LIBS TEST_HEADERS