diff --git a/programs/aes/aescrypt2.c b/programs/aes/aescrypt2.c
index 027062499..d57d47a03 100644
--- a/programs/aes/aescrypt2.c
+++ b/programs/aes/aescrypt2.c
@@ -79,7 +79,9 @@ int main( int argc, char *argv[] )
     FILE *fkey, *fin = NULL, *fout = NULL;
 
     char *p;
+
     unsigned char IV[16];
+    unsigned char tmp[16];
     unsigned char key[512];
     unsigned char digest[32];
     unsigned char buffer[1024];
@@ -123,10 +125,10 @@ int main( int argc, char *argv[] )
     }
 
     mode = atoi( argv[1] );
-    memset(IV, 0, sizeof(IV));
-    memset(key, 0, sizeof(key));
-    memset(digest, 0, sizeof(digest));
-    memset(buffer, 0, sizeof(buffer));
+    memset( IV,     0, sizeof( IV ) );
+    memset( key,    0, sizeof( key ) );
+    memset( digest, 0, sizeof( digest ) );
+    memset( buffer, 0, sizeof( buffer ) );
 
     if( mode != MODE_ENCRYPT && mode != MODE_DECRYPT )
     {
@@ -185,8 +187,6 @@ int main( int argc, char *argv[] )
         }
     }
 
-    memset( argv[4], 0, strlen( argv[4] ) );
-
 #if defined(_WIN32_WCE)
     filesize = fseek( fin, 0L, SEEK_END );
 #else
@@ -272,7 +272,6 @@ int main( int argc, char *argv[] )
             mbedtls_md_finish( &sha_ctx, digest );
         }
 
-        memset( key, 0, sizeof( key ) );
         mbedtls_aes_setkey_enc( &aes_ctx, digest, 256 );
         mbedtls_md_hmac_starts( &sha_ctx, digest, 32 );
 
@@ -319,7 +318,6 @@ int main( int argc, char *argv[] )
 
     if( mode == MODE_DECRYPT )
     {
-        unsigned char tmp[16];
 
         /*
          *  The encrypted file must be structured as follows:
@@ -374,7 +372,6 @@ int main( int argc, char *argv[] )
             mbedtls_md_finish( &sha_ctx, digest );
         }
 
-        memset( key, 0, sizeof( key ) );
         mbedtls_aes_setkey_dec( &aes_ctx, digest, 256 );
         mbedtls_md_hmac_starts( &sha_ctx, digest, 32 );
 
@@ -441,6 +438,15 @@ exit:
     if( fout )
         fclose( fout );
 
+    /* Zeroize all command line arguments to also cover
+       the case when the user has missed or reordered some,
+       in which case the key might not be in argv[4]. */
+    for( i = 0; i < argc; i++ )
+        memset( argv[i], 0, strlen( argv[i] ) );
+
+    memset( IV,     0, sizeof( IV ) );
+    memset( key,    0, sizeof( key ) );
+    memset( tmp,    0, sizeof( tmp ) );
     memset( buffer, 0, sizeof( buffer ) );
     memset( digest, 0, sizeof( digest ) );