diff --git a/src/lib_ccx/ccx_encoders_spupng.c b/src/lib_ccx/ccx_encoders_spupng.c
index b3ca5fa0b..3eb0e9b04 100644
--- a/src/lib_ccx/ccx_encoders_spupng.c
+++ b/src/lib_ccx/ccx_encoders_spupng.c
@@ -44,7 +44,6 @@ struct spupng_t
 #define CCPL (ccfont2_width / CCW * ccfont2_height / CCH)
 
 static int initialized = 0;
-
 void spupng_init_font()
 {
 	uint8_t *t, *p;
@@ -139,12 +138,38 @@ void spunpg_free(struct spupng_t *sp)
 	free(sp->relative_path_png);
 	free(sp);
 }
+void sanitize_and_write_comment(FILE *fpxml, const char *input_file) 
+{
+    char sanitized_file[300]; 
+    int j = 0;
 
+    for (int i = 0; input_file[i] != '\0' && j < sizeof(sanitized_file) - 1; i++) {
+        if (input_file[i] == '-') {
+            
+            if (input_file[i + 1] == '-') 
+			{
+                sanitized_file[j++] = ' '; 
+                i++; 
+            } 
+			else 
+			{
+                sanitized_file[j++] = input_file[i];
+            }
+        } 
+		else 
+		{
+            sanitized_file[j++] = input_file[i];
+        }
+    }
+    sanitized_file[j] = '\0'; 
+
+    fprintf(fpxml, "<!-- %s -->\n", sanitized_file);
+}
 void spupng_write_header(struct spupng_t *sp, int multiple_files, char *first_input_file)
 {
 	fprintf(sp->fpxml, "<subpictures>\n<stream>\n");
 	if (multiple_files)
-		fprintf(sp->fpxml, "<!-- %s -->\n", first_input_file);
+		sanitize_and_write_comment(sp->fpxml, first_input_file);
 }
 
 void spupng_write_footer(struct spupng_t *sp)