diff --git a/middleware/simple_ema.c b/middleware/simple_ema.c
index c1912a0..567b107 100644
--- a/middleware/simple_ema.c
+++ b/middleware/simple_ema.c
@@ -1,6 +1,6 @@
 #include <stdio.h>
+#include "simple_ema.h"
 
-// Exponential Moving Average Lowpass Filter
 void ema_filter(float current_value, float *previous_ema, float alpha)
 {
 	*previous_ema =
diff --git a/middleware/simple_ema.h b/middleware/simple_ema.h
new file mode 100644
index 0000000..901e787
--- /dev/null
+++ b/middleware/simple_ema.h
@@ -0,0 +1,7 @@
+#ifndef SIMPLE_EMA
+#define SIMPLE_EMA
+
+// Exponential Moving Average Lowpass Filter
+ema_filter(float current_value, float *previous_ema, float alpha);
+
+#endif /* SIMPLE_EMA */
\ No newline at end of file