diff --git a/src/interfaces/ecpg/pgtypeslib/common.c b/src/interfaces/ecpg/pgtypeslib/common.c
index b91bedcd581..719b18b0290 100644
--- a/src/interfaces/ecpg/pgtypeslib/common.c
+++ b/src/interfaces/ecpg/pgtypeslib/common.c
@@ -1,4 +1,5 @@
 #include <errno.h>
+#include <stdlib.h>
 
 #include "extern.h"