diff --git a/src/core/Tools.cpp b/src/core/Tools.cpp
index f635932a1..5d1d6e2c9 100644
--- a/src/core/Tools.cpp
+++ b/src/core/Tools.cpp
@@ -37,6 +37,8 @@
 #include <time.h> // for nanosleep()
 #endif
 
+#include "config-keepassx.h"
+
 #if defined(HAVE_PR_SET_DUMPABLE)
 #include <sys/prctl.h>
 #elif defined(HAVE_RLIMIT_CORE)