diff --git a/wled00/bus_manager.h b/wled00/bus_manager.h
index d036d615..ddbef221 100644
--- a/wled00/bus_manager.h
+++ b/wled00/bus_manager.h
@@ -335,7 +335,7 @@ class BusManager {
   };
 
   //utility to get the approx. memory usage of a given BusConfig
-  uint32_t memUsage(BusConfig &bc) {
+  static uint32_t memUsage(BusConfig &bc) {
     uint8_t type = bc.type;
     uint16_t len = bc.count;
     if (type < 32) {
diff --git a/wled00/cfg.cpp b/wled00/cfg.cpp
index 1717a4f3..f3e81ae0 100644
--- a/wled00/cfg.cpp
+++ b/wled00/cfg.cpp
@@ -134,7 +134,7 @@ void deserializeConfig() {
     s++;
     lC += length;
     BusConfig bc = BusConfig(ledType, pins, start, length, colorOrder, reversed, skipFirst);
-    mem += busses.memUsage(bc);
+    mem += BusManager::memUsage(bc);
     if (mem <= MAX_LED_MEMORY) busses.add(bc);
   }
   if (lC > ledCount) ledCount = lC; // fix incorrect total length (honour analog setup)
diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index 272522cd..0b72d2e6 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -226,7 +226,7 @@ void WLED::loop()
       uint32_t mem = 0;
       for (uint8_t i = 0; i < WLED_MAX_BUSSES; i++) {
         if (busConfigs[i] == nullptr) break;
-        mem += busses.memUsage(*busConfigs[i]);
+        mem += BusManager::memUsage(*busConfigs[i]);
         if (mem <= MAX_LED_MEMORY) busses.add(*busConfigs[i]);
         delete busConfigs[i]; busConfigs[i] = nullptr;
       }