diff --git a/programs/pkey/rsa_sign.c b/programs/pkey/rsa_sign.c
index 0693a36..f033eab 100644
--- a/programs/pkey/rsa_sign.c
+++ b/programs/pkey/rsa_sign.c
@@ -34,7 +34,7 @@
 #define polarssl_printf     printf
 #endif
 
-#if defined(POLARSSL_BIGNUM_C) && defined(POLARSSL_RSA_C) &&\
+#if defined(POLARSSL_BIGNUM_C) && defined(POLARSSL_RSA_C) && \
     defined(POLARSSL_SHA256_C) && defined(POLARSSL_FS_IO)
 #include "polarssl/rsa.h"
 #include "polarssl/sha1.h"