diff --git a/src/lib_ccx/ccx_encoders_helpers.c b/src/lib_ccx/ccx_encoders_helpers.c
index fb7d25396..00f96b45b 100644
--- a/src/lib_ccx/ccx_encoders_helpers.c
+++ b/src/lib_ccx/ccx_encoders_helpers.c
@@ -13,13 +13,6 @@
 // userdefined rgb color
 unsigned char usercolor_rgb[8] = "";
 
-struct word_list
-{
-	char **words;
-	size_t len;
-	size_t capacity;
-};
-
 struct word_list capitalization_list = {
     .words = NULL,
     .len = 0,
diff --git a/src/lib_ccx/ccx_encoders_helpers.h b/src/lib_ccx/ccx_encoders_helpers.h
index dae1f4c48..2b1f24cb6 100644
--- a/src/lib_ccx/ccx_encoders_helpers.h
+++ b/src/lib_ccx/ccx_encoders_helpers.h
@@ -6,7 +6,6 @@
 #include "ccx_decoders_structs.h"
 #include "ccx_decoders_608.h"
 #include "ccx_encoders_common.h"
-#include <png.h>
 
 extern struct word_list capitalization_list;
 extern struct word_list profane;
@@ -15,6 +14,13 @@ extern const char *profane_builtin[];
 
 extern unsigned char usercolor_rgb[8];
 
+struct word_list
+{
+	char **words;
+	size_t len;
+	size_t capacity;
+};
+
 struct ccx_encoders_helpers_settings_t
 {
 	int trim_subs;
@@ -43,6 +49,4 @@ void shell_sort(void *base, int nb, size_t size, int (*compar)(const void *p1, c
 
 void ccx_encoders_helpers_perform_shellsort_words(void);
 void ccx_encoders_helpers_setup(enum ccx_encoding_type encoding, int no_font_color, int no_type_setting, int trim_subs);
-
-int mapclut_paletee(png_color *palette, png_byte *alpha, uint32_t *clut, uint8_t depth);
 #endif
diff --git a/src/lib_ccx/ccx_encoders_spupng.c b/src/lib_ccx/ccx_encoders_spupng.c
index de5151c11..815c521ed 100644
--- a/src/lib_ccx/ccx_encoders_spupng.c
+++ b/src/lib_ccx/ccx_encoders_spupng.c
@@ -1,6 +1,6 @@
 #include "ccfont2.xbm" // CC font from libzvbi
 #include "ccx_common_common.h"
-#include "ccx_encoders_common.h"
+#include "ccx_encoders_spupng.h"
 #include <png.h>
 #include <ft2build.h>
 #include <math.h>
@@ -704,7 +704,7 @@ uint32_t *utf8_to_utf32(char *src)
 }
 
 // Convert big-endian and little-endian
-#define BigtoLittle32(A) ((((uint32_t)(A)&0xff000000) >> 24) | (((uint32_t)(A)&0x00ff0000) >> 8) | (((uint32_t)(A)&0x0000ff00) << 8) | (((uint32_t)(A)&0x000000ff) << 24))
+#define BigtoLittle32(A) ((((uint32_t)(A) & 0xff000000) >> 24) | (((uint32_t)(A) & 0x00ff0000) >> 8) | (((uint32_t)(A) & 0x0000ff00) << 8) | (((uint32_t)(A) & 0x000000ff) << 24))
 
 // Generate PNG file from an UTF-8 string (str)
 // PNG file will be stored at output
diff --git a/src/lib_ccx/ccx_encoders_spupng.h b/src/lib_ccx/ccx_encoders_spupng.h
new file mode 100644
index 000000000..25277df3c
--- /dev/null
+++ b/src/lib_ccx/ccx_encoders_spupng.h
@@ -0,0 +1,4 @@
+#include <png.h>
+#include "ccx_encoders_common.h"
+
+int mapclut_paletee(png_color *palette, png_byte *alpha, uint32_t *clut, uint8_t depth);
\ No newline at end of file
diff --git a/src/rust/build.rs b/src/rust/build.rs
index 7341eeebb..9429cdb12 100644
--- a/src/rust/build.rs
+++ b/src/rust/build.rs
@@ -33,15 +33,12 @@ fn main() {
         "gop_time_code",
         "ccx_s_options",
         "ccx_s_teletext_config",
-        "ccx_output_format",
-        "ccx_boundary_time",
         "ccx_output_date_format",
         "ccx_encoding_type",
-        "ccx_output_date_format",
         "ccx_decoder_608_settings",
         "ccx_decoder_608_report",
-        "ccx_output_format",
         "uint8_t",
+        "word_list",
     ]);
 
     #[cfg(feature = "hardsubx_ocr")]
diff --git a/src/rust/src/common.rs b/src/rust/src/common.rs
index e1ad15cbb..c9be2dcea 100644
--- a/src/rust/src/common.rs
+++ b/src/rust/src/common.rs
@@ -625,3 +625,13 @@ impl CType<encoder_cfg> for EncoderConfig {
         }
     }
 }
+
+impl CType<word_list> for Vec<String> {
+    unsafe fn to_ctype(&self) -> word_list {
+        return word_list {
+            words: string_to_c_chars(self.clone()),
+            len: self.len(),
+            capacity: self.capacity(),
+        };
+    }
+}
diff --git a/src/rust/src/lib.rs b/src/rust/src/lib.rs
index b88493605..a65eec8a6 100644
--- a/src/rust/src/lib.rs
+++ b/src/rust/src/lib.rs
@@ -29,7 +29,7 @@ use std::{io::Write, os::raw::c_char, os::raw::c_int};
 use args::Args;
 use bindings::*;
 use clap::{error::ErrorKind, Parser};
-use common::{CType2, FromRust};
+use common::{CType, CType2, FromRust};
 use decoder::Dtvcc;
 use lib_ccxr::{common::Options, teletext::TeletextConfig, util::log::ExitCause};
 use parser::OptionsExt;
@@ -60,6 +60,8 @@ extern "C" {
     static mut MPEG_CLOCK_FREQ: c_int;
     static mut tlt_config: ccx_s_teletext_config;
     static mut ccx_options: ccx_s_options;
+    static mut capitalization_list: word_list;
+    static mut profane: word_list;
 }
 
 /// Initialize env logger with custom format, using stdout as target
@@ -253,8 +255,8 @@ pub unsafe extern "C" fn ccxr_parse_parameters(argc: c_int, argv: *mut *mut c_ch
         }
     };
 
-    let mut capitalization_list: Vec<String> = Vec::new();
-    let mut profane: Vec<String> = Vec::new();
+    let mut _capitalization_list: Vec<String> = Vec::new();
+    let mut _profane: Vec<String> = Vec::new();
 
     let mut opt = Options::default();
     let mut _tlt_config = TeletextConfig::default();
@@ -262,13 +264,21 @@ pub unsafe extern "C" fn ccxr_parse_parameters(argc: c_int, argv: *mut *mut c_ch
     opt.parse_parameters(
         &args,
         &mut _tlt_config,
-        &mut capitalization_list,
-        &mut profane,
+        &mut _capitalization_list,
+        &mut _profane,
     );
     tlt_config = _tlt_config.to_ctype(&opt);
+
     // Convert the rust struct (CcxOptions) to C struct (ccx_s_options), so that it can be used by the C code
     ccx_options.copy_from_rust(opt);
 
+    if !_capitalization_list.is_empty() {
+        capitalization_list = _capitalization_list.to_ctype();
+    }
+    if !_profane.is_empty() {
+        profane = _profane.to_ctype();
+    }
+
     ExitCause::Ok.exit_code()
 }
 
diff --git a/src/rust/wrapper.h b/src/rust/wrapper.h
index 7205fac4a..a7297478f 100644
--- a/src/rust/wrapper.h
+++ b/src/rust/wrapper.h
@@ -10,3 +10,4 @@
 #include "../lib_ccx/lib_ccx.h"
 #include "../lib_ccx/hardsubx.h"
 #include "../lib_ccx/utility.h"
+#include "../lib_ccx/ccx_encoders_helpers.h"