diff --git a/buffer/prs_readblob.c b/buffer/prs_readblob.c
index bccac50..28017df 100644
--- a/buffer/prs_readblob.c
+++ b/buffer/prs_readblob.c
@@ -73,7 +73,7 @@ int main() {
   // now try to provoke integer overflow
   bs_init_membuf(&bs, (const unsigned char*)"\x34\x12", 2);
   assert(bs_get(&bs) == 0x34);
-  assert(prs_readblob(&bs, buf, (size_t)-1) == -1);
+  assert(prs_readblob(&bs, buf, (size_t)-1) == -1);	// ignore compiler warning pls
   // a bad implementation would add 0xffffffff to the 1 we already read and wrap to 0
   // our code makes sure not to wrap and also limits the length of the
   // blob to max_ssize_t (0x7fffffff).
diff --git a/ent.c b/ent.c
index 81e76f0..edb68d9 100644
--- a/ent.c
+++ b/ent.c
@@ -1,4 +1,5 @@
 #define _BSD_SOURCE
+#define _DEFAULT_SOURCE
 #include <stdio.h>
 #include <ctype.h>
 #include <string.h>
diff --git a/scan/scan_xlongn.c b/scan/scan_xlongn.c
index 181196e..2c3958d 100644
--- a/scan/scan_xlongn.c
+++ b/scan/scan_xlongn.c
@@ -32,7 +32,7 @@ int main() {
   if (sizeof(i)==4)
     assert(scan_xlongn("fefec0debaad",14,&i)==8 && i==0xfefec0de);	// test truncation
   else if (sizeof(i)==8)
-    assert(scan_xlongn("fefec0debaadc0debl06",40,&i)==16 && i==0xfefec0debaadc0de);	// test truncation
+    assert(scan_xlongn("fefec0debaadc0debl06",21,&i)==16 && i==0xfefec0debaadc0de);	// test truncation
   return 0;
 }
 #endif