diff --git a/checkin_notes b/checkin_notes
index 2d0601d55f..f446954482 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -4543,3 +4543,9 @@ David  14 May 2009
             translation.inc
         ops/
             build_po.php
+
+Charlie 15 May 2009
+    Fix compiler warning.
+
+    lib/
+        util.cpp
diff --git a/lib/util.cpp b/lib/util.cpp
index 8b31bd39e4..7772b3c15e 100644
--- a/lib/util.cpp
+++ b/lib/util.cpp
@@ -328,7 +328,7 @@ int read_file_malloc(const char* path, char*& buf, size_t max_len, bool tail) {
         size = max_len;
     }
 #endif
-    size_t isize = size;
+    size_t isize = (size_t)size;
     buf = (char*)malloc(isize+1);
     size_t n = fread(buf, 1, isize, f);
     buf[n] = 0;