diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d31900..1fe8010 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -308,7 +308,7 @@ set_target_properties(catch PROPERTIES EXCLUDE_FROM_ALL TRUE)
 ExternalProject_Get_Property(catch SOURCE_DIR)
 if(NOT EXISTS ${CMAKE_SOURCE_DIR}/tests/catch.hpp)
   target_include_directories(test_suite
-    PUBLIC "${SOURCE_DIR}/include/"
+    PUBLIC "${SOURCE_DIR}/single_include/"
     )
   add_dependencies(test_suite catch)
 endif()
diff --git a/tests/network.cpp b/tests/network.cpp
index 33cf023..a52eb6a 100644
--- a/tests/network.cpp
+++ b/tests/network.cpp
@@ -1,5 +1,6 @@
 #include "catch.hpp"
 #include <network/tls_policy.hpp>
+#include <sstream>
 
 #ifdef BOTAN_FOUND
 TEST_CASE("tls_policy")