diff --git a/DOSBox-mt32-patch/asyncThread/midi_mt32.h b/DOSBox-mt32-patch/asyncThread/midi_mt32.h
index 8d8edcc..a6886c7 100644
--- a/DOSBox-mt32-patch/asyncThread/midi_mt32.h
+++ b/DOSBox-mt32-patch/asyncThread/midi_mt32.h
@@ -71,14 +71,7 @@ private:
 			LOG_MSG("MT32: LCD-Message: %s", message);
 		}
 
-		virtual void printDebug(const char *fmt, va_list list) {
-			if (midiHandler_mt32.noise) {
-				char s[1024];
-				strcpy(s, "MT32: ");
-				vsnprintf(s + 6, 1017, fmt, list);
-				LOG_MSG(s);
-			}
-		}
+		virtual void printDebug(const char *fmt, va_list list);
 	} reportHandler;
 
 	static void mixerCallBack(Bitu len);
@@ -222,6 +215,15 @@ private:
 	}
 } midiHandler_mt32;
 
+void MidiHandler_mt32::MT32ReportHandler::printDebug(const char *fmt, va_list list) {
+	if (midiHandler_mt32.noise) {
+		char s[1024];
+		strcpy(s, "MT32: ");
+		vsnprintf(s + 6, 1017, fmt, list);
+		LOG_MSG(s);
+	}
+}
+
 void MidiHandler_mt32::mixerCallBack(Bitu len) {
 	if (midiHandler_mt32.renderInThread) {
 		while (midiHandler_mt32.renderPos == midiHandler_mt32.playPos) {
diff --git a/DOSBox-mt32-patch/singleThread/midi_mt32.h b/DOSBox-mt32-patch/singleThread/midi_mt32.h
index 39325fc..0685cc7 100644
--- a/DOSBox-mt32-patch/singleThread/midi_mt32.h
+++ b/DOSBox-mt32-patch/singleThread/midi_mt32.h
@@ -55,14 +55,7 @@ private:
 			LOG_MSG("MT32: LCD-Message: %s", message);
 		}
 
-		virtual void printDebug(const char *fmt, va_list list) {
-			if (midiHandler_mt32.noise) {
-				char s[1024];
-				strcpy(s, "MT32: ");
-				vsnprintf(s + 6, 1017, fmt, list);
-				LOG_MSG(s);
-			}
-		}
+		virtual void printDebug(const char *fmt, va_list list);
 	} reportHandler;
 
 public:
@@ -165,6 +158,15 @@ private:
 	}
 } midiHandler_mt32;
 
+void MidiHandler_mt32::MT32ReportHandler::printDebug(const char *fmt, va_list list) {
+	if (midiHandler_mt32.noise) {
+		char s[1024];
+		strcpy(s, "MT32: ");
+		vsnprintf(s + 6, 1017, fmt, list);
+		LOG_MSG(s);
+	}
+}
+
 void MidiHandler_mt32::mixerCallBack(Bitu len) {
 	midiHandler_mt32.render(len, (Bit16s *)MixTemp);
 }
diff --git a/DOSBox-mt32-patch/syncThread/midi_mt32.h b/DOSBox-mt32-patch/syncThread/midi_mt32.h
index fd7d8c7..60dd667 100644
--- a/DOSBox-mt32-patch/syncThread/midi_mt32.h
+++ b/DOSBox-mt32-patch/syncThread/midi_mt32.h
@@ -63,14 +63,7 @@ private:
 				LOG_MSG("MT32: LCD-Message: %s", message);
 			}
 
-			virtual void printDebug(const char *fmt, va_list list) {
-				if (midiHandler_mt32.noise) {
-					char s[1024];
-					strcpy(s, "MT32: ");
-					vsnprintf(s + 6, 1017, fmt, list);
-					LOG_MSG(s);
-				}
-			}
+			virtual void printDebug(const char *fmt, va_list list);
 		} reportHandler;
 
 	static void mixerCallBack(Bitu len);
@@ -198,6 +191,15 @@ private:
 	}
 } midiHandler_mt32;
 
+void MidiHandler_mt32::MT32ReportHandler::printDebug(const char *fmt, va_list list) {
+	if (midiHandler_mt32.noise) {
+		char s[1024];
+		strcpy(s, "MT32: ");
+		vsnprintf(s + 6, 1017, fmt, list);
+		LOG_MSG(s);
+	}
+}
+
 void MidiHandler_mt32::mixerCallBack(Bitu len) {
 	if (midiHandler_mt32.renderInThread) {
 		SDL_SemWait(midiHandler_mt32.procIdleSem);