diff --git a/add-app/pigpio/buuild_fix_issue.md b/add-app/pigpio/buuild_fix_issue.md
new file mode 100644
index 0000000..e6ddc62
--- /dev/null
+++ b/add-app/pigpio/buuild_fix_issue.md
@@ -0,0 +1,8 @@
+## undefined reference to makedev
+add 
+
+```
+#include <sys/sysmacros.h>
+```
+
+in pigpio.c