diff --git a/include/log.h b/include/log.h
index 226b48b..9fa8079 100644
--- a/include/log.h
+++ b/include/log.h
@@ -3,10 +3,12 @@
 
 #include <stdio.h>
 
-void log_init(FILE* fd);
-void log_puts(const char* msg);
-void log_printf(const char* fmt, ...);
+#include "macros.h"
+
+void log_init(FILE* NNULLABLE fd);
+void log_puts(const char* NNULLABLE msg);
+void log_printf(const char* NNULLABLE fmt, ...);
 // NOLINTNEXTLINE(readability-identifier-length)
-void log_perror(const char* s);
+void log_perror(const char* NNULLABLE s);
 
 #endif