diff --git a/library/error.c b/library/error.c
index d9ad638..eaf75ad 100644
--- a/library/error.c
+++ b/library/error.c
@@ -366,7 +366,7 @@
         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_GEN_FAILED) )
             mbedtls_snprintf( buf, buflen, "RSA - Something failed during generation of a key" );
         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_CHECK_FAILED) )
-            mbedtls_snprintf( buf, buflen, "RSA - Key failed to pass the library's validity check" );
+            mbedtls_snprintf( buf, buflen, "RSA - Key failed to pass the validity check of the library" );
         if( use_ret == -(MBEDTLS_ERR_RSA_PUBLIC_FAILED) )
             mbedtls_snprintf( buf, buflen, "RSA - The public key operation failed" );
         if( use_ret == -(MBEDTLS_ERR_RSA_PRIVATE_FAILED) )
@@ -378,7 +378,7 @@
         if( use_ret == -(MBEDTLS_ERR_RSA_RNG_FAILED) )
             mbedtls_snprintf( buf, buflen, "RSA - The random generator failed to generate non-zeros" );
         if( use_ret == -(MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION) )
-            mbedtls_snprintf( buf, buflen, "RSA - The implementation doesn't offer the requested operation, e.g. because of security violations or lack of functionality" );
+            mbedtls_snprintf( buf, buflen, "RSA - The implementation does not offer the requested operation, for example, because of security violations or lack of functionality" );
         if( use_ret == -(MBEDTLS_ERR_RSA_HW_ACCEL_FAILED) )
             mbedtls_snprintf( buf, buflen, "RSA - RSA hardware accelerator failed" );
 #endif /* MBEDTLS_RSA_C */