diff --git a/SP5WWP/m17-packet/m17-packet-encode.c b/SP5WWP/m17-packet/m17-packet-encode.c
index 16ade21..ec5cdc6 100644
--- a/SP5WWP/m17-packet/m17-packet-encode.c
+++ b/SP5WWP/m17-packet/m17-packet-encode.c
@@ -403,7 +403,7 @@ int main(int argc, char* argv[])
         lsf.dst[5-i]=(dst_encoded>>(i*8))&0xFF;
         lsf.src[5-i]=(src_encoded>>(i*8))&0xFF;
     }
-    fprintf(stderr, "DST: %s\t%012lX\nSRC: %s\t%012lX\n", dst_raw, dst_encoded, src_raw, src_encoded);
+    fprintf(stderr, "DST: %s\t%012llX\nSRC: %s\t%012llX\n", dst_raw, dst_encoded, src_raw, src_encoded);
     //fprintf(stderr, "DST: %02X %02X %02X %02X %02X %02X\n", lsf.dst[0], lsf.dst[1], lsf.dst[2], lsf.dst[3], lsf.dst[4], lsf.dst[5]);
     //fprintf(stderr, "SRC: %02X %02X %02X %02X %02X %02X\n", lsf.src[0], lsf.src[1], lsf.src[2], lsf.src[3], lsf.src[4], lsf.src[5]);
     type=((uint16_t)0b01<<1)|((uint16_t)can<<7); //packet mode, content: data