diff --git a/g10/gpg.h b/g10/gpg.h
index d4e66e72d..6b879271f 100644
--- a/g10/gpg.h
+++ b/g10/gpg.h
@@ -39,7 +39,7 @@
 
 
 /* Number of bits we accept when reading or writing MPIs. */
-#define MAX_EXTERN_MPI_BITS 16384
+#define MAX_EXTERN_MPI_BITS 65536
 
 /* The maximum length of a binary fingerprints.  This is used to
  * provide a static buffer and will be increased if we need to support