diff --git a/gverilog.c b/gverilog.c
index 2524d72c4..8c6d5d2f2 100644
--- a/gverilog.c
+++ b/gverilog.c
@@ -121,16 +121,17 @@ void create_outputfilename(char *input, char *output)
   int spacepos=0;
   int i=0;
 
-  dotpos = strlen(input);
-  for(i=dotpos; i!=0; i--){
+  for(i=strlen(input); i!=0; i--){
     if ((dotpos == 0) && (input[i] == '.')) dotpos = i;
     if ((spacepos == 0) && (input[i] == ' ')) spacepos = i;
   }
   
-  if ((dotpos != 0) && (dotpos > spacepos)) {
-    output = strncpy(output, &input[spacepos+1], dotpos-spacepos-3);
+  if (dotpos == 0) {
+    dotpos = strlen(input);
   }
 
+  output = strncpy(output, &input[spacepos+1], dotpos-spacepos-1);
+
   return;
 }