diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index 017557a..c9a13f4 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -643,9 +643,13 @@
  */
 static inline mbedtls_rsa_context *mbedtls_pk_rsa( const mbedtls_pk_context pk )
 {
-    return( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_RSA ?
-            (mbedtls_rsa_context *) (pk).pk_ctx :
-            NULL );
+    switch( mbedtls_pk_get_type( &pk ) )
+    {
+        case MBEDTLS_PK_RSA:
+            return( (mbedtls_rsa_context *) (pk).pk_ctx );
+        default:
+            return( NULL );
+    }
 }
 #endif /* MBEDTLS_RSA_C */
 
@@ -663,11 +667,15 @@
  */
 static inline mbedtls_ecp_keypair *mbedtls_pk_ec( const mbedtls_pk_context pk )
 {
-    return( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_ECKEY ||
-            mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_ECKEY_DH ||
-            mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_ECDSA ?
-            (mbedtls_ecp_keypair *) (pk).pk_ctx :
-            NULL );
+    switch( mbedtls_pk_get_type( &pk ) )
+    {
+        case MBEDTLS_PK_ECKEY:
+        case MBEDTLS_PK_ECKEY_DH:
+        case MBEDTLS_PK_ECDSA:
+            return( (mbedtls_ecp_keypair *) (pk).pk_ctx );
+        default:
+            return( NULL );
+    }
 }
 #endif /* MBEDTLS_ECP_C */