diff --git a/src/odoors/GNUmakefile b/src/odoors/GNUmakefile
index 8bef5cb84c8223469822783ca621d8bf9fcd7fe3..edfba62502be007403c903147c099c65a1324089 100644
--- a/src/odoors/GNUmakefile
+++ b/src/odoors/GNUmakefile
@@ -85,7 +85,7 @@ endif
 #
 # Define primary target.
 #
-all: ${LIBDIR}libODoors${SHLIB} ${LIBDIR}libODoors${STATICLIB} ex_diag
+all: ${LIBDIR}libODoors${SHLIB} ${LIBDIR}libODoors${STATICLIB} ex_diag ex_hello
 #
 #------------------------------------------------------------------------------
 #
@@ -159,5 +159,8 @@ ex_chat: ex_chat.c ${LIBDIR}libODoors${SHLIB}
 ex_diag: ex_diag.c ${LIBDIR}libODoors${SHLIB}
 	$(CC) $(CFLAGS) ex_diag.c -o ex_diag -lODoors
 
+ex_hello: ex_hello.c ${LIBDIR}libODoors${SHLIB}
+	$(CC) $(CFLAGS) ex_hello.c -o ex_hello -lODoors
+
 #
 #------------------------------------------------------------------------------
diff --git a/src/odoors/ex_hello.c b/src/odoors/ex_hello.c
index 1b620aaa2be733d98491aab652769e725f9f349e..01449839b44f033c5c84fd9d15b8c1287c6603c3 100644
--- a/src/odoors/ex_hello.c
+++ b/src/odoors/ex_hello.c
@@ -15,7 +15,7 @@
 
 
 /* The opendoor.h file must be included by any program using OpenDoors. */
-#include "opendoor.h"
+#include "OpenDoor.h"
 
 
 /* The main() or WinMain() function: program execution begins here. */