Index: ext/misc/spellfix.c
==================================================================
--- ext/misc/spellfix.c
+++ ext/misc/spellfix.c
@@ -754,10 +754,11 @@
 /*
 ** Return TRUE (non-zero) if the To side of the given cost matches
 ** the given string.
 */
 static int matchTo(EditDist3Cost *p, const char *z, int n){
+  if( p->a[p->nFrom]!=z[0] ) return 0;
   if( p->nTo>n ) return 0;
   if( strncmp(p->a+p->nFrom, z, p->nTo)!=0 ) return 0;
   return 1;
 }
 
@@ -765,10 +766,11 @@
 ** Return TRUE (non-zero) if the From side of the given cost matches
 ** the given string.
 */
 static int matchFrom(EditDist3Cost *p, const char *z, int n){
   assert( p->nFrom<=n );
+  if( p->a[0]!=z[0] ) return 0;
   if( strncmp(p->a, z, p->nFrom)!=0 ) return 0;
   return 1;
 }
 
 /*
@@ -781,10 +783,11 @@
   const char *z2,             /* Right-handl comparison character */
   int n2                      /* Bytes remaining in z2[] */
 ){
   int b1 = pStr->a[n1].nByte;
   if( b1>n2 ) return 0;
+  if( pStr->z[n1]!=z2[0] ) return 0;
   if( strncmp(pStr->z+n1, z2, b1)!=0 ) return 0;
   return 1;
 }
 
 /*