diff --git a/libs/main/core/pibase.h b/libs/main/core/pibase.h
index 4da1ba6a..9a41ff7a 100644
--- a/libs/main/core/pibase.h
+++ b/libs/main/core/pibase.h
@@ -46,6 +46,7 @@
 #include <cassert>
 #include <cstddef>
 #include <functional>
+#include <initializer_list>
 #include <limits>
 
 //! \~\brief
diff --git a/libs/main/text/pistring_std.h b/libs/main/text/pistring_std.h
index 873fd227..cda20450 100644
--- a/libs/main/text/pistring_std.h
+++ b/libs/main/text/pistring_std.h
@@ -26,6 +26,7 @@
 #define PISTRING_STD_H
 
 
+#include <ostream>
 #include <string>
 #ifdef QNX
 typedef std::basic_string<wchar_t> wstring;