diff --git a/examples/foc/foc_fixed16_thr.c b/examples/foc/foc_fixed16_thr.c
index 2ba2998e6..3c9a8c77b 100644
--- a/examples/foc/foc_fixed16_thr.c
+++ b/examples/foc/foc_fixed16_thr.c
@@ -26,6 +26,8 @@
 
 #include <nuttx/config.h>
 
+#include <nuttx/spinlock.h>
+
 #include <assert.h>
 #include <dspb16.h>
 #include <fcntl.h>
diff --git a/examples/foc/foc_float_thr.c b/examples/foc/foc_float_thr.c
index af967f255..4c52b86bf 100644
--- a/examples/foc/foc_float_thr.c
+++ b/examples/foc/foc_float_thr.c
@@ -26,6 +26,8 @@
 
 #include <nuttx/config.h>
 
+#include <nuttx/spinlock.h>
+
 #include <assert.h>
 #include <dsp.h>
 #include <fcntl.h>