diff --git a/src/interfaces/ecpg/compatlib/informix.c b/src/interfaces/ecpg/compatlib/informix.c
index 689e58b100..562ab9282e 100644
--- a/src/interfaces/ecpg/compatlib/informix.c
+++ b/src/interfaces/ecpg/compatlib/informix.c
@@ -6,7 +6,7 @@
 #include <limits.h>
 
 #include <ecpgtype.h>
-#include <compatlib.h>
+#include <ecpg_informix.h>
 #include <pgtypes_error.h>
 #include <pgtypes_date.h>
 #include <pgtypes_numeric.h>