diff --git a/configure.in b/configure.in
index bef57d1..1261330 100644
--- a/configure.in
+++ b/configure.in
@@ -101,7 +101,7 @@ AC_CHECK_HEADER(Evas_Engine_Software_DDraw.h,
 
 have_ddraw_16="no"
 AC_CHECK_HEADER(Evas_Engine_Software_16_DDraw.h,
-  [ AC_DEFINE(HAVE_SOFTWARE_DDRAW, 1, [Evas 16bit Software DirectDraw Engine Support])
+  [ AC_DEFINE(HAVE_SOFTWARE_16_DDRAW, 1, [Evas 16bit Software DirectDraw Engine Support])
     have_ddraw_16="yes"
     ddraw_16_libs="-lddraw -ldxguid" ],
   [ dummy=no ],
diff --git a/src/bin/engine_software_16_ddraw.c b/src/bin/engine_software_16_ddraw.c
index 220e565..93c7ceb 100644
--- a/src/bin/engine_software_16_ddraw.c
+++ b/src/bin/engine_software_16_ddraw.c
@@ -1,16 +1,16 @@
 #include "main.h"
 
 
-#ifndef HAVE_SOFTWARE_DDRAW
+#ifndef HAVE_SOFTWARE_16_DDRAW
 int
-engine_software_ddraw_args(int argc, char **argv)
+engine_software_16_ddraw_args(int argc, char **argv)
 {
   fprintf(stderr, "ERROR: No 16bits Software DirectDraw Engine built\n");
   return 0;
 }
 
 void
-engine_software_ddraw_loop(void)
+engine_software_16_ddraw_loop(void)
 {
 }
 #else