diff --git a/otp.c b/otp.c
index 8996132..4261e20 100644
--- a/otp.c
+++ b/otp.c
@@ -529,16 +529,32 @@ int handle_decrypt_menu(void) {
             return 1;
         }
         
-        // Ask for custom output filename (optional)
-        printf("\nEnter output filename (or press Enter for default): ");
+        // Generate smart default output filename and use enhanced input function
+        char default_output[512];
+        strncpy(default_output, input_file, sizeof(default_output) - 1);
+        default_output[sizeof(default_output) - 1] = '\0';
+        
+        // Remove common encrypted extensions to get a better default
+        if (strstr(default_output, ".otp.asc")) {
+            // Replace .otp.asc with original extension or no extension
+            char* ext_pos = strstr(default_output, ".otp.asc");
+            *ext_pos = '\0';
+        } else if (strstr(default_output, ".otp")) {
+            // Replace .otp with original extension or no extension  
+            char* ext_pos = strstr(default_output, ".otp");
+            *ext_pos = '\0';
+        } else {
+            // No recognized encrypted extension, add .decrypted suffix
+            strncat(default_output, ".decrypted", sizeof(default_output) - strlen(default_output) - 1);
+        }
+        
         char output_file[512];
-        if (!fgets(output_file, sizeof(output_file), stdin)) {
+        if (get_filename_with_default("Output filename:", default_output, output_file, sizeof(output_file)) != 0) {
             printf("Error: Failed to read input\n");
             return 1;
         }
-        output_file[strcspn(output_file, "\n")] = 0;
         
-        const char* output_filename = (strlen(output_file) > 0) ? output_file : NULL;
+        const char* output_filename = output_file;
         
         return decrypt_file(input_file, output_filename);
     }