diff --git a/g13/mount.c b/g13/mount.c
index fc640e0ee..a9203d11f 100644
--- a/g13/mount.c
+++ b/g13/mount.c
@@ -139,7 +139,8 @@ read_keyblob (const char *filename,
 {
   gpg_error_t err;
   estream_t fp = NULL;
-  size_t headerlen, msglen;
+  size_t headerlen = 0;
+  size_t msglen;
   void *msg = NULL;
 
   *r_enckeyblob = NULL;
diff --git a/sm/misc.c b/sm/misc.c
index ec9f97e02..39897f4e8 100644
--- a/sm/misc.c
+++ b/sm/misc.c
@@ -112,7 +112,7 @@ transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
   int depth, last_depth1, last_depth2;
   int is_pubkey = 0;
   const unsigned char *rsa_s = NULL;
-  size_t rsa_s_len;
+  size_t rsa_s_len = 0;
   const char *oid;
   gcry_sexp_t sexp;