diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -955,9 +955,8 @@
                              0) +
                        ". " +
                        "If <category> is not supplied or if <category> = 1, "
-                       "output all debugging information."
-                       "<category> can be: " +
-                       ListLogCategories() + ".",
+                       "output all debugging information. <category> can be: " +
+                       LogInstance().LogCategoriesString() + ".",
                    ArgsManager::ALLOW_ANY, OptionsCategory::DEBUG_TEST);
     argsman.AddArg(
         "-debugexclude=<category>",
diff --git a/src/logging.h b/src/logging.h
--- a/src/logging.h
+++ b/src/logging.h
@@ -10,6 +10,7 @@
 #include <fs.h>
 #include <threadsafety.h>
 #include <tinyformat.h>
+#include <util/string.h>
 
 #include <atomic>
 #include <cstdint>
@@ -25,7 +26,7 @@
 extern bool fLogIPs;
 extern const char *const DEFAULT_DEBUGLOGFILE;
 
-struct CLogCategoryActive {
+struct LogCategory {
     std::string category;
     bool active;
 };
@@ -142,6 +143,14 @@
     /** Return true if log accepts specified category */
     bool WillLogCategory(LogFlags category) const;
 
+    /** Returns a vector of the log categories */
+    std::vector<LogCategory> LogCategoriesList();
+    /** Returns a string with the log categories */
+    std::string LogCategoriesString() {
+        return Join(LogCategoriesList(), ", ",
+                    [&](const LogCategory &i) { return i.category; });
+    };
+
     /** Default for whether ShrinkDebugFile should be run */
     bool DefaultShrinkDebugFile() const;
 };
@@ -155,12 +164,6 @@
     return LogInstance().WillLogCategory(category);
 }
 
-/** Returns a string with the log categories. */
-std::string ListLogCategories();
-
-/** Returns a vector of the active log categories. */
-std::vector<CLogCategoryActive> ListActiveLogCategories();
-
 /** Return true if str parses as a log category and set the flag */
 bool GetLogCategory(BCLog::LogFlags &flag, const std::string &str);
 
diff --git a/src/logging.cpp b/src/logging.cpp
--- a/src/logging.cpp
+++ b/src/logging.cpp
@@ -139,32 +139,15 @@
     return false;
 }
 
-std::string ListLogCategories() {
-    std::string ret;
-    int outcount = 0;
-    for (const CLogCategoryDesc &category_desc : LogCategories) {
-        // Omit the special cases.
-        if (category_desc.flag != BCLog::NONE &&
-            category_desc.flag != BCLog::ALL) {
-            if (outcount != 0) {
-                ret += ", ";
-            }
-            ret += category_desc.category;
-            outcount++;
-        }
-    }
-    return ret;
-}
-
-std::vector<CLogCategoryActive> ListActiveLogCategories() {
-    std::vector<CLogCategoryActive> ret;
+std::vector<LogCategory> BCLog::Logger::LogCategoriesList() {
+    std::vector<LogCategory> ret;
     for (const CLogCategoryDesc &category_desc : LogCategories) {
         // Omit the special cases.
         if (category_desc.flag != BCLog::NONE &&
             category_desc.flag != BCLog::ALL) {
-            CLogCategoryActive catActive;
+            LogCategory catActive;
             catActive.category = category_desc.category;
-            catActive.active = LogAcceptCategory(category_desc.flag);
+            catActive.active = WillLogCategory(category_desc.flag);
             ret.push_back(catActive);
         }
     }
diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -641,7 +641,7 @@
         "If an item is both included and excluded, it will thus end up being "
         "excluded.\n"
         "The valid logging categories are: " +
-            ListLogCategories() +
+            LogInstance().LogCategoriesString() +
             "\n"
             "In addition, the following are available as category names with "
             "special meanings:\n"
@@ -713,8 +713,7 @@
     }
 
     UniValue result(UniValue::VOBJ);
-    std::vector<CLogCategoryActive> vLogCatActive = ListActiveLogCategories();
-    for (const auto &logCatActive : vLogCatActive) {
+    for (const auto &logCatActive : LogInstance().LogCategoriesList()) {
         result.pushKV(logCatActive.category, logCatActive.active);
     }