diff --git a/src/add-ons/print/drivers/pdf/source/PrinterSettings.cpp b/src/add-ons/print/drivers/pdf/source/PrinterSettings.cpp
index 96581954ab..7109e07b3f 100644
--- a/src/add-ons/print/drivers/pdf/source/PrinterSettings.cpp
+++ b/src/add-ons/print/drivers/pdf/source/PrinterSettings.cpp
@@ -120,7 +120,7 @@ PrinterSettings::WriteSettings(BMessage* msg)
 	status_t err = B_ERROR;
 	
 	length = msg->FlattenedSize();
-	if (length < B_OK)
+	if (length < 0)
 		return length;
 	data = (char *) malloc(length);
 	if (data != NULL) {
diff --git a/src/kits/network/libnetapi/NetBuffer.cpp b/src/kits/network/libnetapi/NetBuffer.cpp
index bd05a68fd1..bc157f6877 100644
--- a/src/kits/network/libnetapi/NetBuffer.cpp
+++ b/src/kits/network/libnetapi/NetBuffer.cpp
@@ -204,7 +204,7 @@ BNetBuffer::AppendMessage(const BMessage& data)
 
 	ssize_t dataSize = data.FlattenedSize();
 
-	if (dataSize < B_OK)
+	if (dataSize < 0)
 		return dataSize;
 
 	if (dataSize == 0)
diff --git a/src/kits/tracker/Tracker.cpp b/src/kits/tracker/Tracker.cpp
index 18e80feca3..fd2e0f4996 100644
--- a/src/kits/tracker/Tracker.cpp
+++ b/src/kits/tracker/Tracker.cpp
@@ -429,7 +429,7 @@ TTracker::QuitRequested()
 		// if message is empty, delete the corresponding attribute
 		if (message.CountNames(B_ANY_TYPE)) {
 			ssize_t size = message.FlattenedSize();
-			if (size > B_OK) {
+			if (size > 0) {
 				char* buffer = new char[size];
 				message.Flatten(buffer, size);
 				deskDir.WriteAttr(kAttrOpenWindows, B_MESSAGE_TYPE, 0, buffer,