diff --git a/src/xrCore/FS.cpp b/src/xrCore/FS.cpp
index 92347177114..1898e12aaa4 100644
--- a/src/xrCore/FS.cpp
+++ b/src/xrCore/FS.cpp
@@ -106,7 +106,7 @@ bool file_handle_internal(LPCSTR file_name, u32& size, int& hFile)
     return (true);
 }
 #else // EDITOR
-static errno_t open_internal(LPCSTR fn, int& handle)
+static int open_internal(LPCSTR fn, int& handle)
 {
     return (
         _sopen_s(
diff --git a/src/xrCore/_std_extensions.h b/src/xrCore/_std_extensions.h
index a8ef6b60f25..7eb30fc6abc 100644
--- a/src/xrCore/_std_extensions.h
+++ b/src/xrCore/_std_extensions.h
@@ -206,12 +206,12 @@ IC int xr_strcmp(const char* S1, const char* S2)
 #ifndef _EDITOR
 #ifndef MASTER_GOLD
 
-inline errno_t xr_strcpy(LPSTR destination, size_t const destination_size, LPCSTR source)
+inline int xr_strcpy(LPSTR destination, size_t const destination_size, LPCSTR source)
 {
     return strcpy_s(destination, destination_size, source);
 }
 
-inline errno_t xr_strcat(LPSTR destination, size_t const buffer_size, LPCSTR source)
+inline int xr_strcat(LPSTR destination, size_t const buffer_size, LPCSTR source)
 {
     return strcat_s(destination, buffer_size, source);
 }
@@ -232,12 +232,12 @@ inline int __cdecl xr_sprintf(char(&destination)[count], LPCSTR format_string, .
 }
 #else // #ifndef MASTER_GOLD
 
-inline errno_t xr_strcpy(LPSTR destination, size_t const destination_size, LPCSTR source)
+inline int xr_strcpy(LPSTR destination, size_t const destination_size, LPCSTR source)
 {
     return strncpy_s(destination, destination_size, source, destination_size);
 }
 
-inline errno_t xr_strcat(LPSTR destination, size_t const buffer_size, LPCSTR source)
+inline int xr_strcat(LPSTR destination, size_t const buffer_size, LPCSTR source)
 {
     size_t const destination_length = xr_strlen(destination);
     LPSTR i = destination + destination_length;
@@ -271,13 +271,13 @@ inline int __cdecl xr_sprintf(char(&destination)[count], LPCSTR format_string, .
 # pragma deprecated( strcpy, strcpy_s, sprintf, sprintf_s, strcat, strcat_s )
 
 template <int count>
-inline errno_t xr_strcpy(char(&destination)[count], LPCSTR source)
+inline int xr_strcpy(char(&destination)[count], LPCSTR source)
 {
     return xr_strcpy(destination, count, source);
 }
 
 template <int count>
-inline errno_t xr_strcat(char(&destination)[count], LPCSTR source)
+inline int xr_strcat(char(&destination)[count], LPCSTR source)
 {
     return xr_strcat(destination, count, source);
 }
diff --git a/src/xrCore/xrDebugNew.cpp b/src/xrCore/xrDebugNew.cpp
index 8231b644ebf..b25e6c5d9e2 100644
--- a/src/xrCore/xrDebugNew.cpp
+++ b/src/xrCore/xrDebugNew.cpp
@@ -792,7 +792,7 @@ static void invalid_parameter_handler(
     string4096 function_;
     string4096 file_;
     size_t converted_chars = 0;
-    // errno_t err =
+    // int err =
     if (expression)
         wcstombs_s(
             &converted_chars,