diff --git a/src/Makefile.am b/src/Makefile.am
index 0a60fb9745..1e05ec2831 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -379,7 +379,11 @@ endif
 GLIB_GENERATED = nm-enum-types.h nm-enum-types.c
 GLIB_MKENUMS_H_FLAGS = --identifier-prefix NM --fhead '\#include <nm-core-enum-types.h>\n'
 GLIB_MKENUMS_C_FLAGS = --identifier-prefix NM
-nm_enum_types_sources = $(libNetworkManager_la_SOURCES)
+nm_enum_types_sources = $(filter-out \
+                              %/nm-device-private.h \
+                              %/nm-rdisc-private.h \
+                              %/wifi-utils-private.h \
+                              , $(libNetworkManager_la_SOURCES))
 
 BUILT_SOURCES = $(GLIB_GENERATED)