-const int BAM_ALIGNMENT_PAIRED = 1;
-const int BAM_ALIGNMENT_PROPER_PAIR = 2;
-const int BAM_ALIGNMENT_UNMAPPED = 4;
-const int BAM_ALIGNMENT_MATE_UNMAPPED = 8;
-const int BAM_ALIGNMENT_REVERSE_STRAND = 16;
-const int BAM_ALIGNMENT_MATE_REVERSE_STRAND = 32;
-const int BAM_ALIGNMENT_READ_1 = 64;
-const int BAM_ALIGNMENT_READ_2 = 128;
-const int BAM_ALIGNMENT_SECONDARY = 256;
-const int BAM_ALIGNMENT_QC_FAILED = 512;
-const int BAM_ALIGNMENT_DUPLICATE = 1024;
+const int BAM_ALIGNMENT_PAIRED = 0x0001;
+const int BAM_ALIGNMENT_PROPER_PAIR = 0x0002;
+const int BAM_ALIGNMENT_UNMAPPED = 0x0004;
+const int BAM_ALIGNMENT_MATE_UNMAPPED = 0x0008;
+const int BAM_ALIGNMENT_REVERSE_STRAND = 0x0010;
+const int BAM_ALIGNMENT_MATE_REVERSE_STRAND = 0x0020;
+const int BAM_ALIGNMENT_READ_1 = 0x0040;
+const int BAM_ALIGNMENT_READ_2 = 0x0080;
+const int BAM_ALIGNMENT_SECONDARY = 0x0100;
+const int BAM_ALIGNMENT_QC_FAILED = 0x0200;
+const int BAM_ALIGNMENT_DUPLICATE = 0x0400;