diff --git a/src/core/nm-default-daemon.h b/src/core/nm-default-daemon.h
index 57d4c6afd..f8270ef4d 100644
--- a/src/core/nm-default-daemon.h
+++ b/src/core/nm-default-daemon.h
@@ -18,6 +18,7 @@
 #include "nm-version.h"
 
 #include "nm-core-types.h"
+#include "nm-errors.h"
 #include "nm-types.h"
 #include "libnm-log-core/nm-logging.h"
 
diff --git a/src/libnm-client-impl/nm-default-libnm.h b/src/libnm-client-impl/nm-default-libnm.h
index 859766a30..b9248e2b5 100644
--- a/src/libnm-client-impl/nm-default-libnm.h
+++ b/src/libnm-client-impl/nm-default-libnm.h
@@ -27,6 +27,7 @@
 #include "nm-client.h"
 #include "nm-vpn-connection.h"
 #include "nm-libnm-utils.h"
+#include "nm-errors.h"
 
 /*****************************************************************************/
 
diff --git a/src/libnm-client-public/NetworkManager.h b/src/libnm-client-public/NetworkManager.h
index 1cd94d111..87954ae91 100644
--- a/src/libnm-client-public/NetworkManager.h
+++ b/src/libnm-client-public/NetworkManager.h
@@ -15,6 +15,8 @@
 
 #include "nm-core-enum-types.h"
 
+#include "nm-errors.h"
+
 #include "nm-connection.h"
 #include "nm-simple-connection.h"
 #include "nm-keyfile.h"
diff --git a/src/libnm-core-impl/nm-default-libnm-core.h b/src/libnm-core-impl/nm-default-libnm-core.h
index 0f27f82d5..013df67d6 100644
--- a/src/libnm-core-impl/nm-default-libnm-core.h
+++ b/src/libnm-core-impl/nm-default-libnm-core.h
@@ -16,6 +16,7 @@
 /*****************************************************************************/
 
 #include "nm-version.h"
+#include "nm-errors.h"
 
 /*****************************************************************************/
 
diff --git a/src/libnm-core-public/nm-connection.h b/src/libnm-core-public/nm-connection.h
index 47004ce80..ff3e0f924 100644
--- a/src/libnm-core-public/nm-connection.h
+++ b/src/libnm-core-public/nm-connection.h
@@ -13,7 +13,6 @@
 
 #include "nm-core-types.h"
 #include "nm-setting.h"
-#include "nm-errors.h"
 
 G_BEGIN_DECLS