diff --git a/database.cc b/database.cc
index a5365103..abae5820 100644
--- a/database.cc
+++ b/database.cc
@@ -24,7 +24,7 @@
 
 #include <xapian.h>
 
-#include <glib.h> /* g_strdup_printf, g_free, GHashTable */
+#include <glib.h> /* g_strdup_printf, g_free, GPtrArray, GHashTable */
 
 using namespace std;