diff --git a/FlippR-Driver/src/utilities/GPIOInterface.h b/FlippR-Driver/src/utilities/GPIOInterface.h
index 0858b78..cd0dd80 100644
--- a/FlippR-Driver/src/utilities/GPIOInterface.h
+++ b/FlippR-Driver/src/utilities/GPIOInterface.h
@@ -24,7 +24,7 @@ public:
 
   static void write_pin(char address, char data);
 
-  static bool read_pin(char address)
+  static bool read_pin(char address);
 };