diff --git a/samples/multidemo.c b/samples/multidemo.c
index 038b74d64..396d7344a 100644
--- a/samples/multidemo.c
+++ b/samples/multidemo.c
@@ -20,6 +20,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #else
+#include <cbm.h>
 #include <device.h>
 #endif
 
diff --git a/samples/overlaydemo.c b/samples/overlaydemo.c
index a4dc53931..7553f3d0e 100644
--- a/samples/overlaydemo.c
+++ b/samples/overlaydemo.c
@@ -15,6 +15,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #else
+#include <cbm.h>
 #include <device.h>
 #endif