diff --git a/library/rsa.c b/library/rsa.c
index fba68dd..60559e2 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -797,7 +797,12 @@
     int ret;
     size_t ilen, pad_count = 0, i;
     unsigned char *p, bad, pad_done = 0;
+#ifdef __clang_analyzer__
+    /* Shut up Clang, mbedtls_rsa_public/private writes to this */
+    unsigned char buf[MBEDTLS_MPI_MAX_SIZE] = { };
+#else
     unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
+#endif
 
     if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
         return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@@ -1175,13 +1180,18 @@
     int ret;
     size_t siglen;
     unsigned char *p;
-    unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
     unsigned char result[MBEDTLS_MD_MAX_SIZE];
     unsigned char zeros[8];
     unsigned int hlen;
     size_t slen, msb;
     const mbedtls_md_info_t *md_info;
     mbedtls_md_context_t md_ctx;
+#ifdef __clang_analyzer__
+    /* Shut up Clang, mbedtls_rsa_public/private writes to this */
+    unsigned char buf[MBEDTLS_MPI_MAX_SIZE] = { };
+#else
+    unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
+#endif
 
     if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
         return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@@ -1320,10 +1330,15 @@
     int ret;
     size_t len, siglen, asn1_len;
     unsigned char *p, *end;
-    unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
     mbedtls_md_type_t msg_md_alg;
     const mbedtls_md_info_t *md_info;
     mbedtls_asn1_buf oid;
+#ifdef __clang_analyzer__
+    /* Shut up Clang, mbedtls_rsa_public/private writes to this */
+    unsigned char buf[MBEDTLS_MPI_MAX_SIZE] = { };
+#else
+    unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
+#endif
 
     if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
         return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );