diff --git a/armsrc/printf.h b/armsrc/printf.h
index c60599225..ff2b6b68a 100644
--- a/armsrc/printf.h
+++ b/armsrc/printf.h
@@ -17,4 +17,4 @@ int kvsprintf(const char *format, void *arg, int radix, va_list ap) __attribute_
 int vsprintf(char *str, const char *format, va_list ap) __attribute__ ((format (printf, 2, 0)));
 int sprintf(char *str, const char *format, ...) __attribute__ ((format (printf, 2, 3)));
 
-#endif
\ No newline at end of file
+#endif
diff --git a/armsrc/util.h b/armsrc/util.h
index 1f4a81748..6f69fba8b 100644
--- a/armsrc/util.h
+++ b/armsrc/util.h
@@ -35,4 +35,4 @@ int BUTTON_CLICKED(int ms);
 int BUTTON_HELD(int ms);
 void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index 8bb4d1091..37355ef26 100644
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -9,6 +9,7 @@
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>
+#include <string.h>
 #include "proxusb.h"
 #include "ui.h"
 #include "graph.h"