diff --git a/libnm-core/nm-version.h.in b/libnm-core/nm-version.h.in
index b96e01f037..79bd959c8c 100644
--- a/libnm-core/nm-version.h.in
+++ b/libnm-core/nm-version.h.in
@@ -21,6 +21,8 @@
 #ifndef NM_VERSION_H
 #define NM_VERSION_H
 
+#include <glib.h>
+
 /**
  * NM_MAJOR_VERSION:
  *
diff --git a/libnm-util/nm-version.h.in b/libnm-util/nm-version.h.in
index bbbf993a9a..d0911b18bd 100644
--- a/libnm-util/nm-version.h.in
+++ b/libnm-util/nm-version.h.in
@@ -21,6 +21,8 @@
 #ifndef NM_VERSION_H
 #define NM_VERSION_H
 
+#include <glib.h>
+
 /**
  * NM_MAJOR_VERSION:
  *