diff --git a/historic/jam/src/filent.c b/historic/jam/src/filent.c
index 3094d9081..24ad198c5 100644
--- a/historic/jam/src/filent.c
+++ b/historic/jam/src/filent.c
@@ -172,7 +172,7 @@ int file_is_file(char* filename)
 	if( stat( filename, &statbuf ) < 0 )
 	    return -1;
 
-    if (statbuf.st_mode & _S_IFREG) 
+    if (statbuf.st_mode & S_IFREG) 
         return 1;
     else
         return 0;    
diff --git a/jam_src/filent.c b/jam_src/filent.c
index 3094d9081..24ad198c5 100644
--- a/jam_src/filent.c
+++ b/jam_src/filent.c
@@ -172,7 +172,7 @@ int file_is_file(char* filename)
 	if( stat( filename, &statbuf ) < 0 )
 	    return -1;
 
-    if (statbuf.st_mode & _S_IFREG) 
+    if (statbuf.st_mode & S_IFREG) 
         return 1;
     else
         return 0;