diff --git a/reactos/lib/3rdparty/libwine/CMakeLists.txt b/reactos/lib/3rdparty/libwine/CMakeLists.txt
index d8059eb51b1..d7bf83449fc 100644
--- a/reactos/lib/3rdparty/libwine/CMakeLists.txt
+++ b/reactos/lib/3rdparty/libwine/CMakeLists.txt
@@ -8,7 +8,7 @@ list(APPEND SOURCE
     isinf.c
     isnan.c
     loader.c
-    ../../sdk/crt/string/wctype.c
+    ${REACTOS_SOURCE_DIR}/lib/sdk/crt/string/wctype.c
     register.c
 #    string.c implements _stricmp, already shipped with crt
 )
diff --git a/reactos/lib/sdk/crt/libcntpr.cmake b/reactos/lib/sdk/crt/libcntpr.cmake
index 7ff88127485..7a5df849b11 100644
--- a/reactos/lib/sdk/crt/libcntpr.cmake
+++ b/reactos/lib/sdk/crt/libcntpr.cmake
@@ -52,6 +52,7 @@ list(APPEND LIBCNTPR_SOURCE
     string/wcstol.c
     string/wcstombs_nt.c
     string/wcstoul.c
+    string/wctype.c
     string/wsplitp.c
     string/wtoi64.c
     string/wtoi.c