Index: src/blob.c
==================================================================
--- src/blob.c
+++ src/blob.c
@@ -750,11 +750,11 @@
         }
 #endif
         zName[i] = '/';
       }
     }
-    out = fopen(zName, "wb");
+    out = fossil_fopen(zName, "wb");
     if( out==0 ){
       fossil_fatal_recursive("unable to open file \"%s\" for writing", zName);
       return 0;
     }
     needToClose = 1;