diff --git a/library/debug.c b/library/debug.c
index c27d15d12e..59969070c4 100644
--- a/library/debug.c
+++ b/library/debug.c
@@ -21,6 +21,20 @@
 /* DEBUG_BUF_SIZE must be at least 2 */
 #define DEBUG_BUF_SIZE      512
 
+/* Temporary hack: on MingW, do not honor the platform.h configuration
+ * for snprintf and vsnprintf. Instead, force the native functions,
+ * which are the standard ones, not the Windows legacy ones.
+ *
+ * This hack should be removed once TF-PSA-Crypto has been updated to
+ * use the standard printf family.
+ */
+#if defined(__MINGW32__)
+#undef mbedtls_snprintf
+#define mbedtls_snprintf snprintf
+#undef mbedtls_vsnprintf
+#define mbedtls_vsnprintf vsnprintf
+#endif
+
 int mbedtls_debug_snprintf(char *dest, size_t maxlen,
                            const char *format, ...)
 {