diff --git a/libnm-core/nm-version.h.in b/libnm-core/nm-version.h.in
index 3ba7cfd832..8ae0df6a5f 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 3ba7cfd832..8ae0df6a5f 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:
  *