diff --git a/modules/mbedtls/configs/config-tls-generic.h b/modules/mbedtls/configs/config-tls-generic.h
index dc94e3d75f3..45bc81f35f2 100644
--- a/modules/mbedtls/configs/config-tls-generic.h
+++ b/modules/mbedtls/configs/config-tls-generic.h
@@ -473,6 +473,7 @@
 
 #if defined(CONFIG_MBEDTLS_PSA_CRYPTO_C)
 #define MBEDTLS_PSA_CRYPTO_C
+#define MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS
 
 #if defined(CONFIG_ARCH_POSIX) && !defined(CONFIG_PICOLIBC)
 #define MBEDTLS_PSA_KEY_SLOT_COUNT     64