diff --git a/firmware/export/panic.h b/firmware/export/panic.h
index fd63687606..fa8f854cd5 100644
--- a/firmware/export/panic.h
+++ b/firmware/export/panic.h
@@ -20,6 +20,8 @@
 #ifndef __PANIC_H__
 #define __PANIC_H__
 
-void panicf( const char *fmt, ... );
+#include "_ansi.h"
+
+void panicf( const char *fmt, ... ) ATTRIBUTE_PRINTF(1, 2);
 
 #endif /* __PANIC_H__ */
diff --git a/firmware/include/_ansi.h b/firmware/include/_ansi.h
index 11c712f84e..449001f74d 100644
--- a/firmware/include/_ansi.h
+++ b/firmware/include/_ansi.h
@@ -72,4 +72,6 @@
 #define _ATTRIBUTE(attrs)
 #endif
 
+#define ATTRIBUTE_PRINTF(fmt, arg1) _ATTRIBUTE( ( format( printf, fmt, arg1 ) ) )
+
 #endif /* _ANSIDECL_H_ */
diff --git a/firmware/include/sprintf.h b/firmware/include/sprintf.h
index b667a0406b..9f2ea7b404 100644
--- a/firmware/include/sprintf.h
+++ b/firmware/include/sprintf.h
@@ -22,12 +22,7 @@
 
 #include <stddef.h>
 #include <stdarg.h>
-
-#ifdef __GNUC__
-#define ATTRIBUTE_PRINTF(fmt, arg1) __attribute__ ( ( format( printf, fmt, arg1 ) ) )
-#else
-#define ATTRIBUTE_PRINTF(fmt, arg1)
-#endif
+#include <_ansi.h>
 
 int snprintf (char *buf, size_t size, const char *fmt, ...)
     ATTRIBUTE_PRINTF(3, 4);