diff --git a/app/core/gimpbacktrace-windows.c b/app/core/gimpbacktrace-windows.c
index 2c76e526bc..f9260dd75f 100644
--- a/app/core/gimpbacktrace-windows.c
+++ b/app/core/gimpbacktrace-windows.c
@@ -237,7 +237,7 @@ gimp_backtrace_exception_handler (PEXCEPTION_POINTERS info)
 
   if (info->ExceptionRecord                   != NULL                      &&
       info->ExceptionRecord->ExceptionCode    == EXCEPTION_SET_THREAD_NAME &&
-      info->ExceptionRecord->NumberParameters * 
+      info->ExceptionRecord->NumberParameters *
       sizeof (ULONG_PTR)                      == sizeof (THREADNAME_INFO))
     {
       THREADNAME_INFO name_info;
@@ -644,7 +644,11 @@ utf8_copy_sized (char       *dest,
   if (size == 0)
     return;
 
+#ifndef _UCRT
   strncpy (dest, src, size);
+#else
+  strncpy_s (dest, sizeof (dest), src, size);
+#endif
 
   if (dest[size - 1] != 0)
     {
diff --git a/libgimpthumb/gimpthumb-utils.c b/libgimpthumb/gimpthumb-utils.c
index 4a391031a2..dc6857bc23 100644
--- a/libgimpthumb/gimpthumb-utils.c
+++ b/libgimpthumb/gimpthumb-utils.c
@@ -864,7 +864,11 @@ gimp_thumb_png_name (const gchar *uri)
       name[i * 2 + 1] = (n > 9) ? 'a' + n - 10 : '0' + n;
     }
 
+#ifndef _UCRT
   strncpy (name + 32, ".png", 5);
+#else
+  strncpy_s (name + 32, 8, ".png", 5);
+#endif
 
   return (const gchar *) name;
 }
diff --git a/libgimpwidgets/gimpeevl.c b/libgimpwidgets/gimpeevl.c
index a643bc097e..e6ddb1ddc6 100644
--- a/libgimpwidgets/gimpeevl.c
+++ b/libgimpwidgets/gimpeevl.c
@@ -454,7 +454,12 @@ gimp_eevl_quantity (GimpEevl *eva)
 
       identifier = g_newa (gchar, consumed_token.value.size + 1);
 
+#ifndef _UCRT
       strncpy (identifier, consumed_token.value.c, consumed_token.value.size);
+#else
+      strncpy_s (identifier, consumed_token.value.size + 1,
+                 consumed_token.value.c, consumed_token.value.size);
+#endif
       identifier[consumed_token.value.size] = '\0';
 
       if (eva->options.unit_resolver_proc (identifier,
diff --git a/plug-ins/common/file-jp2.c b/plug-ins/common/file-jp2.c
index fed4d50d41..b0d39a91df 100644
--- a/plug-ins/common/file-jp2.c
+++ b/plug-ins/common/file-jp2.c
@@ -1925,7 +1925,12 @@ export_image (GFile          *file,
   if (save_comment && comment && strlen (comment))
     {
       parameters.cp_comment = g_malloc0 (strlen (comment) + 1);
+#ifndef _UCRT
       strncpy (parameters.cp_comment, comment, strlen (comment));
+#else
+      strncpy_s (parameters.cp_comment, sizeof (parameters.cp_comment),
+                 comment, strlen (comment));
+#endif
     }
 
   if (! cmyk)
diff --git a/plug-ins/file-icns/file-icns-load.c b/plug-ins/file-icns/file-icns-load.c
index e1bf3c29ef..f1709e1074 100644
--- a/plug-ins/file-icns/file-icns-load.c
+++ b/plug-ins/file-icns/file-icns-load.c
@@ -83,14 +83,22 @@ resource_load (FILE *file)
           gchar   type[5];
           guint32 size;
 
+#ifndef _UCRT
           strncpy (type, header.type, 4);
+#else
+          strncpy_s (type, 5, header.type, 4);
+#endif
           type[4] = '\0';
           size = GUINT32_FROM_BE (header.size);
 
           if (! strncmp (header.type, "icns", 4) && size > sizeof (IcnsResourceHeader))
             {
               res = (IcnsResource *) g_new (guchar, sizeof (IcnsResource) + size);
+#ifndef _UCRT
               strncpy (res->type, header.type, 4);
+#else
+              strncpy_s (res->type, 5, header.type, 4);
+#endif
               res->type[4] = '\0';
               res->size = size;
               res->cursor = sizeof (IcnsResourceHeader);
@@ -144,7 +152,11 @@ resource_get_next (IcnsResource *icns,
     return FALSE;
 
   header = (IcnsResourceHeader *) &(icns->data[icns->cursor]);
+#ifndef _UCRT
   strncpy (res->type, header->type, 4);
+#else
+  strncpy_s (res->type, 5, header->type, 4);
+#endif
   res->size   = GUINT32_FROM_BE (header->size);
   res->cursor = sizeof (IcnsResourceHeader);
   res->data   = &(icns->data[icns->cursor]);
@@ -455,7 +467,11 @@ icns_attach_image (GimpImage    *image,
   guint           expected_size;
   gboolean        layer_loaded = FALSE;
 
+#ifndef _UCRT
   strncpy (layer_name, icontype->type, 4);
+#else
+  strncpy_s (layer_name, 5, icontype->type, 4);
+#endif
   layer_name[4] = '\0';
 
   row = 4 * icontype->width;
@@ -481,7 +497,11 @@ icns_attach_image (GimpImage    *image,
       gchar          *temp_file_type = NULL;
       gchar          *procedure_name = NULL;
 
+#ifndef _UCRT
       strncpy (image_type, (gchar *) icns->data + 8, 4);
+#else
+      strncpy_s (image_type, 5, (gchar *) icns->data + 8, 4);
+#endif
       image_type[4] = '\0';
 
       /* PNG */