diff --git a/src/fr/anssi/smartpgp/Common.java b/src/fr/anssi/smartpgp/Common.java
index 317a99a..c4d04de 100644
--- a/src/fr/anssi/smartpgp/Common.java
+++ b/src/fr/anssi/smartpgp/Common.java
@@ -160,7 +160,7 @@ public final class Common {
     protected static final short writeAlgorithmInformation(final byte key_tag,
                                                            final byte[] buf, short off) {
         for(short m = 2; m <= 4; ++m) {
-            for(byte form = 1; form <= 3; form += 2) {
+            for(byte form = Constants.RSA_IMPORT_SUPPORTS_FORMAT_1 ? 1 : 3; form <= 3; form += 2) {
                 buf[off++] = key_tag;
                 buf[off++] = (byte)6; /* len */
                 buf[off++] = (byte)0x01; /* RSA */
diff --git a/src/fr/anssi/smartpgp/Constants.java b/src/fr/anssi/smartpgp/Constants.java
index 9887a50..c0b42e2 100644
--- a/src/fr/anssi/smartpgp/Constants.java
+++ b/src/fr/anssi/smartpgp/Constants.java
@@ -224,4 +224,6 @@ public final class Constants {
 
     protected static final short AES_BLOCK_SIZE = (short)16;
 
+    protected static final boolean RSA_IMPORT_SUPPORTS_FORMAT_1 = false;
+
 }