diff --git a/tools/voicefont.c b/tools/voicefont.c
index 9e5603e458..4da67fabed 100644
--- a/tools/voicefont.c
+++ b/tools/voicefont.c
@@ -217,6 +217,7 @@ int voicefont(FILE* voicefontids,int targetnum,char* filedir, FILE* output)
 #ifndef RBUTIL
 int main (int argc, char** argv)
 {
+    FILE *ids, *output;
 
     if (argc < 2)
     {
@@ -228,14 +229,14 @@ int main (int argc, char** argv)
         return -1;
     }
     
-    FILE* ids = fopen(argv[1], "r");
+    ids = fopen(argv[1], "r");
     if (ids == NULL)
     {
         printf("Error opening language file %s\n", argv[1]);
         return -2;
     }
 
-    FILE* output = fopen(argv[4], "wb");
+    output = fopen(argv[4], "wb");
     if (output == NULL)
     {
         printf("Error opening output file %s\n", argv[4]);
diff --git a/tools/wavtrim.c b/tools/wavtrim.c
index 86fec7e256..b82f270c8d 100644
--- a/tools/wavtrim.c
+++ b/tools/wavtrim.c
@@ -130,6 +130,7 @@ int wavtrim(char * filename, int maxsilence ,char* errstring,int errsize)
     }
 
     datalen = Read32(pBuf+datapos-4);
+    skip_head = skip_tail = 0;
     
     sps = Read32(pBuf + 24);
     pad_head = sps * 10 / 1000; /* 10 ms */