diff --git a/third_party/mbedtls/Makefile.am b/third_party/mbedtls/Makefile.am
index c5b9dcd0c..aae66a904 100644
--- a/third_party/mbedtls/Makefile.am
+++ b/third_party/mbedtls/Makefile.am
@@ -55,6 +55,7 @@ libmbedcrypto_a_SOURCES                       = \
     repo/library/ecdh.c                         \
     repo/library/ecdsa.c                        \
     repo/library/ecjpake.c                      \
+    repo/library/ecp.c                          \
     repo/library/ecp_curves.c                   \
     repo/library/entropy.c                      \
     repo/library/entropy_poll.c                 \
@@ -80,14 +81,6 @@ libmbedcrypto_a_SOURCES                       = \
     repo/library/x509_crt.c                     \
     $(NULL)
 
-if !OPENTHREAD_EXAMPLES_EFR32MG12
-if !OPENTHREAD_EXAMPLES_EFR32MG21
-libmbedcrypto_a_SOURCES                      += \
-    repo/library/ecp.c                          \
-    $(NULL)
-endif
-endif
-
 if OPENTHREAD_BUILD_COVERAGE
 Dash                                          = -
 CLEANFILES                                    = $(shell find $(top_builddir)/third_party/mbedtls $(Dash)name "*.gcda" $(Dash)o $(Dash)name "*.gcno")