diff --git a/common/auth/polarssl/polarssl.mk b/common/auth/polarssl/polarssl.mk
index f7d92ea..69c741f 100644
--- a/common/auth/polarssl/polarssl.mk
+++ b/common/auth/polarssl/polarssl.mk
@@ -54,7 +54,6 @@
 				pkwrite.c 				\
 				platform.c 				\
 				rsa.c 					\
-				sha1.c					\
 				sha256.c				\
 				x509.c 					\
 				x509_crt.c 				\
diff --git a/common/auth/polarssl/polarssl_config.h b/common/auth/polarssl/polarssl_config.h
index 531e084..b419bf9 100644
--- a/common/auth/polarssl/polarssl_config.h
+++ b/common/auth/polarssl/polarssl_config.h
@@ -65,7 +65,6 @@
 #define POLARSSL_PLATFORM_C
 
 #define POLARSSL_RSA_C
-#define POLARSSL_SHA1_C
 #define POLARSSL_SHA256_C
 
 #define POLARSSL_VERSION_C