diff --git a/scripts/mbedtls_framework/ecp.py b/scripts/mbedtls_framework/ecp.py
index f9df5bdf5..9192e0638 100644
--- a/scripts/mbedtls_framework/ecp.py
+++ b/scripts/mbedtls_framework/ecp.py
@@ -86,7 +86,9 @@ class EcpP192R1Raw(bignum_common.ModOperationCommon,
 
     @property
     def is_valid(self) -> bool:
-        return True
+        # secp192r1 support has been removed from development, but it's stil
+        # available in 3.6 branch.
+        return build_tree.is_mbedtls_3_6()
 
     def arguments(self)-> List[str]:
         args = super().arguments()
@@ -553,7 +555,9 @@ class EcpP192K1Raw(bignum_common.ModOperationCommon,
 
     @property
     def is_valid(self) -> bool:
-        return True
+        # secp192k1 support has been removed from development, but it's stil
+        # available in 3.6 branch.
+        return build_tree.is_mbedtls_3_6()
 
     def arguments(self):
         args = super().arguments()