diff --git a/sword1/music.cpp b/sword1/music.cpp
index c002aed40d0..911cfceb1d3 100644
--- a/sword1/music.cpp
+++ b/sword1/music.cpp
@@ -85,8 +85,7 @@ int MusicHandle::readBuffer(int16 *buffer, const int numSamples) {
 bool MusicHandle::play(const char *filename, bool loop) {
 	uint8 wavHeader[WAVEHEADERSIZE];
 	stop();
-	_file.open(filename);
-	if (!_file.isOpen()) {
+	if (!_file.open(filename)) {
 		warning("Music file %s could not be opened", filename);
 		return false;
 	}
diff --git a/sword2/driver/d_sound.cpp b/sword2/driver/d_sound.cpp
index 5dbf75d49fd..dc1666d6734 100644
--- a/sword2/driver/d_sound.cpp
+++ b/sword2/driver/d_sound.cpp
@@ -699,8 +699,7 @@ uint32 Sound::preFetchCompSpeech(const char *filename, uint32 speechid, uint16 *
 	*buf = NULL;
 
 	// Open the speech cluster and find the data offset & size
-	fp.open(filename);
-	if (!fp.isOpen())
+	if (!fp.open(filename))
 		return 0;
 
 	fp.seek((speechid + 1) * 8, SEEK_SET);
diff --git a/sword2/function.cpp b/sword2/function.cpp
index fbde8e44d37..ea4a89b5842 100644
--- a/sword2/function.cpp
+++ b/sword2/function.cpp
@@ -446,14 +446,12 @@ int32 Logic::fnPlayCredits(int32 *params) {
 
 	// Read the "Smacker" logo
 
-	f.open("credits.bmp");
-
 	uint16 logoWidth = 0;
 	uint16 logoHeight = 0;
 	uint8 *logoData = NULL;
 	uint8 palette[1024];
 
-	if (f.isOpen()) {
+	if (f.open("credits.bmp")) {
 		logoWidth = f.readUint16LE();
 		logoHeight = f.readUint16LE();
 
@@ -491,8 +489,7 @@ int32 Logic::fnPlayCredits(int32 *params) {
 
 	char textLine[80];
 
-	f.open("credits.clu");
-	if (!f.isOpen()) {
+	if (!f.open("credits.clu")) {
 		warning("Can't find credits.clu");
 		return IR_CONT;
 	}
diff --git a/sword2/resman.cpp b/sword2/resman.cpp
index 7718f9426e8..ee0162aa98a 100644
--- a/sword2/resman.cpp
+++ b/sword2/resman.cpp
@@ -521,11 +521,8 @@ uint8 *ResourceManager::openResource(uint32 res, bool dump) {
 			sprintf(buf, "dumps/%s-%d.dmp", tag, res);
 #endif
 
-			out.open(buf, "");
-
-			if (!out.isOpen()) {
-				out.open(buf, "", File::kFileWriteMode);
-				if (out.isOpen())
+			if (!out.open(buf, "")) {
+				if (out.open(buf, "", File::kFileWriteMode))
 					out.write(_resList[res]->ad, len);
 			}