diff -r dee2ca687a14 -r 0db713dc8590 ucx/cx/string.h
--- a/ucx/cx/string.h	Fri Jan 16 11:56:17 2026 +0100
+++ b/ucx/cx/string.h	Wed Jan 21 20:12:59 2026 +0100
@@ -1335,10 +1335,10 @@
 bool cx_strtok_next_(CxStrtokCtx *ctx, cxstring *token);
 
 #ifdef __cplusplus
-CX_CPPDECL cx_strtok_next(CxStrtokCtx *ctx, cxstring *token) {
+CX_CPPDECL bool cx_strtok_next(CxStrtokCtx *ctx, cxstring *token) {
     return cx_strtok_next_(ctx, token);
 }
-CX_CPPDECL cx_strtok_next(CxStrtokCtx *ctx, cxmutstr *token) {
+CX_CPPDECL bool cx_strtok_next(CxStrtokCtx *ctx, cxmutstr *token) {
     // Note: this is actually UB - fixed with start_lifetime_as() in C++23
     //       but it works on all supported platforms
     return cx_strtok_next_(ctx, reinterpret_cast<cxstring*>(token));