diff --git a/src/Makefile.am b/src/Makefile.am
index 5e935f4..57af82a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -4,5 +4,7 @@
 libstdplus_la_SOURCES =
 libstdplus_la_LIBADD = $(COMMON_LIBS)
 
+nobase_include_HEADERS += stdplus/handle/managed.hpp
+
 nobase_include_HEADERS += stdplus/signal.hpp
 libstdplus_la_SOURCES += stdplus/signal.cpp