diff --git a/serviceinterface/ServiceInterfaceStream.cpp b/serviceinterface/ServiceInterfaceStream.cpp
index be8dc7709..80942b880 100644
--- a/serviceinterface/ServiceInterfaceStream.cpp
+++ b/serviceinterface/ServiceInterfaceStream.cpp
@@ -19,7 +19,7 @@ bool ServiceInterfaceStream::crAdditionEnabled() const {
     return streambuf.crAdditionEnabled();
 }
 
-bool ServiceInterfaceStream::setAsciiColorPrefix(std::string asciiColorCode) {
+void ServiceInterfaceStream::setAsciiColorPrefix(std::string asciiColorCode) {
     streambuf.setAsciiColorPrefix(asciiColorCode);
 }
 
diff --git a/serviceinterface/ServiceInterfaceStream.h b/serviceinterface/ServiceInterfaceStream.h
index 3c788b3c4..aceddb22c 100644
--- a/serviceinterface/ServiceInterfaceStream.h
+++ b/serviceinterface/ServiceInterfaceStream.h
@@ -46,7 +46,7 @@ public:
 	 */
 	bool crAdditionEnabled() const;
 
-	bool setAsciiColorPrefix(std::string asciiColorCode);
+	void setAsciiColorPrefix(std::string asciiColorCode);
 
 protected:
 	ServiceInterfaceBuffer streambuf;