diff --git a/src/msgs/build_file.epp b/src/msgs/build_file.epp
index 93f0160832..5eda8649b6 100644
--- a/src/msgs/build_file.epp
+++ b/src/msgs/build_file.epp
@@ -34,7 +34,6 @@
 #include "../jrd/ibase.h"
 #include "../yvalve/msg.h"
 #include "../yvalve/gds_proto.h"
-#include "../common/os/os_utils.h"
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
@@ -337,7 +336,7 @@ static USHORT do_msgs( const TEXT* filename, const TEXT* locale, bool sw_warning
 
 	// Open output file
 
-	global_file = os_utils::open(filename, O_WRONLY | O_CREAT | O_BINARY, 0666);
+	global_file = open(filename, O_WRONLY | O_CREAT | O_BINARY, 0666);
 	if (global_file == -1)
 	{
 		printf("Can't open %s\n", filename);
@@ -449,7 +448,7 @@ static USHORT do_msgs( const TEXT* filename, const TEXT* locale, bool sw_warning
 
 	// Re-write header record and finish
 
-	os_utils::lseek(global_file, LSEEK_OFFSET_CAST 0, 0);
+	lseek(global_file, LSEEK_OFFSET_CAST 0, 0);
 	FB_UNUSED(write(global_file, &header, sizeof(header)));
 	close(global_file);
 	global_file = -1;