https://bugs.gentoo.org/919223
--- a/src/readSet.c
+++ b/src/readSet.c
@@ -638,7 +638,8 @@ static void readFastXFile(int fileType, SequencesWriter *seqWriteInfo, char *fil
 	FileGZOrAuto file;
 	IDnum counter = 0;
 
-        file.gzFile = file.autoFile = NULL;
+        file.autoFile = NULL;
+        file.gzFile = NULL;
         if (fileType == AUTO) {
         	file.autoFile = openFileAuto(filename);
                 if (!file.autoFile)
@@ -677,8 +678,10 @@ static void readFastXPair(int fileType, SequencesWriter *seqWriteInfo, char *fil
 	if (cat==REFERENCE)
 		exitErrorf(EXIT_FAILURE, false, "Cannot read reference sequence in 'separate' read mode");
 
-        file1.gzFile = file1.autoFile = NULL;
-        file2.gzFile = file2.autoFile = NULL;
+        file1.autoFile = NULL;
+        file2.autoFile = NULL;
+        file1.autoFile = NULL;
+        file2.autoFile = NULL;
         if (fileType == AUTO) {
         	file1.autoFile = openFileAuto(filename1);
                 if (!file1.autoFile)