diff --git a/targets/targets.json b/targets/targets.json
index 6c6a92bda7..d98fc12fc1 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -2764,7 +2764,7 @@
     "EFM32": {
         "inherits": ["Target"],
         "extra_labels": ["Silicon_Labs", "EFM32"],
-        "macros": ["MBEDTLS_CONFIG_HW_SUPPORT"],
+        "macros": ["MBEDTLS_CONFIG_HW_SUPPORT", "MBED_TICKLESS"],
         "public": false
     },
     "EFM32GG990F1024": {