diff --git a/include/merror.h b/include/merror.h
index 4b32159..d2540ff 100644
--- a/include/merror.h
+++ b/include/merror.h
@@ -14,6 +14,7 @@
 #define __DEBUG   1
 #define __WARNING 2
 #define __ERROR   3
+#define __BUG     4
 
 __attribute__((format(printf, 4, 5)))
 void __log_impl_pos(int line, int column, int type, const char *format, ...);
@@ -25,6 +26,9 @@ void __log_impl(int type, const char *format, ...);
 #define WARNING(format, ...) \
         __log_impl(__WARNING, format, ##__VA_ARGS__)
 
+#define BUG(format, ...) \
+        __log_impl(__BUG, format, ##__VA_ARGS__)
+
 #define ERROR(format, ...) \
         __log_impl(__ERROR, format, ##__VA_ARGS__)
 
diff --git a/lib/error.c b/lib/error.c
index 3d88234..262896e 100644
--- a/lib/error.c
+++ b/lib/error.c
@@ -25,6 +25,9 @@ void __log_impl_pos(int line, int column, int type, const char *format, ...)
         case __ERROR:
                 t = "\033[31merror:\033[0m";
                 break;
+        case __BUG:
+                t = "\033[31bug:\033[0m";
+                break;
         }
 
         if (current_file != NULL)
@@ -55,6 +58,9 @@ void __log_impl(int type, const char *format, ...)
         case __ERROR:
                 t = "\033[31merror:\033[0m";
                 break;
+        case __BUG:
+                t = "\033[31bug:\033[0m";
+                break;
         }
 
         if (current_file != NULL)