diff --git a/debug.hpp b/debug.hpp
index 56a86c1..6cadc4e 100644
--- a/debug.hpp
+++ b/debug.hpp
@@ -193,6 +193,18 @@
 #ifndef DEBUG_OUTPUT
 # define DEBUG_OUTPUT std::cerr <<
 #endif
+#ifndef DEBUG_GROUP
+# define DEBUG_GROUP 0
+#endif
+#ifndef DEBUG_OUTPUT_GROUP
+# define DEBUG_OUTPUT_GROUP(x) do { \
+    if (DEBUG_GROUP == 0) { \
+        DEBUG_OUTPUT(x); \
+    } else if (group == DEBUG_GROUP) { \
+        DEBUG_OUTPUT(x); \
+    } \
+} while (0)
+#endif
 #ifndef DEBUG_ENABLE_FILES_MATCH
 # define DEBUG_ENABLE_FILES_MATCH 0
 #endif
@@ -1310,6 +1322,7 @@ struct DEBUG_NODISCARD debug {
         panic = 2,
         supress = 3,
     } state;
+    int group;
 
     DEBUG_SOURCE_LOCATION loc;
 # if DEBUG_SHOW_TIMESTAMP == 2
@@ -1524,7 +1537,7 @@ struct DEBUG_NODISCARD debug {
     }
 # endif
 public:
-    explicit debug(bool enable = true,
+    explicit debug(int group = 0, bool enable = true,
                    DEBUG_SOURCE_LOCATION const &loc =
                        DEBUG_SOURCE_LOCATION::current()) noexcept
         : state(enable
@@ -1533,7 +1546,8 @@ struct DEBUG_NODISCARD debug {
 # endif
                     ? silent
                     : supress),
-          loc(loc) {
+          loc(loc),
+          group(group) {
     }
 
     debug &setloc(DEBUG_SOURCE_LOCATION const &newloc =
@@ -1603,7 +1617,7 @@ struct DEBUG_NODISCARD debug {
                 throw std::runtime_error(oss.str());
 # elif DEBUG_PANIC_METHOD == 1
                 oss << '\n';
-                DEBUG_OUTPUT(oss.str());
+                DEBUG_OUTPUT_GROUP(oss.str());
 #  if defined(DEBUG_PANIC_CUSTOM_TRAP)
                 DEBUG_PANIC_CUSTOM_TRAP;
                 return;
@@ -1622,18 +1636,18 @@ struct DEBUG_NODISCARD debug {
 #  endif
 # elif DEBUG_PANIC_METHOD == 2
                 oss << '\n';
-                DEBUG_OUTPUT(oss.str());
+                DEBUG_OUTPUT_GROUP(oss.str());
                 std::terminate();
 # else
                 oss << '\n';
-                DEBUG_OUTPUT(oss.str());
+                DEBUG_OUTPUT_GROUP(oss.str());
                 return;
 # endif
             }
         }
         if (state == print) {
             oss << '\n';
-            DEBUG_OUTPUT(oss.str());
+            DEBUG_OUTPUT_GROUP(oss.str());
         }
 # if DEBUG_STEPPING == 1
         static std::mutex mutex;
@@ -1971,7 +1985,7 @@ DEBUG_NAMESPACE_END
 DEBUG_NAMESPACE_BEGIN
 
 struct debug {
-    debug(bool = true, char const * = nullptr) noexcept {}
+    debug(int = 0, bool = true, char const * = nullptr) noexcept {}
 
     debug(debug &&) = delete;
     debug(debug const &) = delete;
@@ -2088,6 +2102,6 @@ DEBUG_NAMESPACE_END
 # undef debug
 #elif DEBUG_LEVEL
 # ifdef DEBUG_SOURCE_LOCATION_FAKER
-#  define debug() debug(true, DEBUG_SOURCE_LOCATION_FAKER)
+# define debug(...) debug(int(__VA_ARGS__), true, DEBUG_SOURCE_LOCATION_FAKER)
 # endif
 #endif