diff --git a/camlibs/mars/library.c b/camlibs/mars/library.c
index 5375a6183..52011369b 100644
--- a/camlibs/mars/library.c
+++ b/camlibs/mars/library.c
@@ -52,7 +52,7 @@ struct _CameraPrivateLibrary {
 	Info info[0x2000];
 };
 
-struct {
+static const struct {
    	char *name;
 	CameraDriverStatus status;
    	unsigned short idVendor;
diff --git a/camlibs/mars/mars.c b/camlibs/mars/mars.c
index e278c73ca..8f4ca82d2 100644
--- a/camlibs/mars/mars.c
+++ b/camlibs/mars/mars.c
@@ -114,7 +114,7 @@ mars_get_pic_data_size (Info *info, int n)
 	return (info[8*n+6]*0x100 + info[8*n+5])*0x100 + info[8*n+4];
 }
 
-int 
+static int 
 set_usb_in_endpoint	(Camera *camera, int inep) 
 {
 	GPPortSettings settings;
@@ -125,7 +125,7 @@ set_usb_in_endpoint	(Camera *camera, int inep)
 }	
 
 
-int 
+static int 
 mars_read_data         (GPPort *port, char *data, int size) 
 { 
 	int MAX_BULK = 0x2000;
diff --git a/camlibs/mars/mars.h b/camlibs/mars/mars.h
index 2667332b1..cdd6cc56c 100644
--- a/camlibs/mars/mars.h
+++ b/camlibs/mars/mars.h
@@ -40,8 +40,6 @@ int mars_init              (Camera *camera, GPPort *port, Info *info);
 int mars_reset	     (GPPort *port);
 int mars_get_num_pics   (Info *info);
 int mars_get_pic_data_size (Info *info, int n);
-int set_usb_in_endpoint	     (Camera *camera, int inep);
-int mars_read_data         (GPPort *port, char *data, int size);
 int mars_read_picture_data (Camera *camera, Info *info,
 				GPPort *port, char *data, int size, int n);