diff --git a/drivers/gpu/drm/ast/Makefile b/drivers/gpu/drm/ast/Makefile
index 6a5b3b247316..2265a8a624dd 100644
--- a/drivers/gpu/drm/ast/Makefile
+++ b/drivers/gpu/drm/ast/Makefile
@@ -3,7 +3,7 @@
 # Makefile for the drm device driver.  This driver provides support for the
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
-ast-y := ast_cursor.o ast_drv.o ast_main.o ast_mode.o ast_ttm.o ast_post.o \
+ast-y := ast_cursor.o ast_drv.o ast_main.o ast_mm.o ast_mode.o ast_post.o \
 	 ast_dp501.o
 
 obj-$(CONFIG_DRM_AST) := ast.o
diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_mm.c
similarity index 100%
rename from drivers/gpu/drm/ast/ast_ttm.c
rename to drivers/gpu/drm/ast/ast_mm.c