add PROGRAM_DIRS line
diff --git a/configs/linux-fbdev b/configs/linux-fbdev
index a6eeebc..c357485 100644
--- a/configs/linux-fbdev
+++ b/configs/linux-fbdev
@@ -1,4 +1,4 @@
-# Configuration for generic Linux
+# Configuration for Linux fbdev interface
 
 include $(TOP)/configs/linux
 
@@ -7,3 +7,4 @@
 
 CFLAGS = -O3 -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM -DPTHREADS -DUSE_GLFBDEV_DRIVER
 
+PROGRAM_DIRS = fbdev