diff --git a/platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/test_abstraction_layers/pal/pal_mbed_os_intf.cpp b/platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/test_abstraction_layers/pal/pal_mbed_os_intf.cpp
index be1c70e255..e5d02563dc 100644
--- a/platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/test_abstraction_layers/pal/pal_mbed_os_intf.cpp
+++ b/platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/test_abstraction_layers/pal/pal_mbed_os_intf.cpp
@@ -31,6 +31,8 @@
 
 #include "lifecycle.h"
 
+#include "mbedtls/entropy.h"
+
 #define TEST_STACK_SIZE 8192
 #define TEST_KEY_ID_VALUE 17