Index: tool/fuzzershell.c
==================================================================
--- tool/fuzzershell.c
+++ tool/fuzzershell.c
@@ -452,11 +452,11 @@
   int nInFile = 0;              /* Number of input files to read */
   char **azInFile = 0;          /* Array of input file names */
   int jj;                       /* Loop counter for azInFile[] */
   sqlite3_int64 iBegin;         /* Start time for the whole program */
   sqlite3_int64 iStart, iEnd;   /* Start and end-times for a test case */
-  const char *zDbName;          /* Name of an on-disk database file to open */
+  const char *zDbName = 0;      /* Name of an on-disk database file to open */
 
   iBegin = timeOfDay();
   zFailCode = getenv("TEST_FAILURE");
   g.zArgv0 = argv[0];
   zPrompt = "<stdin>";