diff --git a/adminer/include/editing.inc.php b/adminer/include/editing.inc.php
index a19b83fb..75a90681 100644
--- a/adminer/include/editing.inc.php
+++ b/adminer/include/editing.inc.php
@@ -523,9 +523,9 @@ function tar_file($filename, $tmp_file) {
 function ini_bytes($ini) {
 	$val = ini_get($ini);
 	switch (strtolower(substr($val, -1))) {
-		case 'g': $val *= 1024; // no break
-		case 'm': $val *= 1024; // no break
-		case 'k': $val *= 1024;
+		case 'g': $val = (int)$val * 1024; // no break
+		case 'm': $val = (int)$val * 1024; // no break
+		case 'k': $val = (int)$val * 1024;
 	}
 	return $val;
 }
diff --git a/adminer/sql.inc.php b/adminer/sql.inc.php
index 1794aaa1..526f8c06 100644
--- a/adminer/sql.inc.php
+++ b/adminer/sql.inc.php
@@ -32,8 +32,8 @@ if (!$error && $_POST) {
 	}
 
 	if (is_string($query)) { // get_file() returns error as number, fread() as false
-		if (function_exists('memory_get_usage')) {
-			@ini_set("memory_limit", max(ini_bytes("memory_limit"), 2 * strlen($query) + memory_get_usage() + 8e6)); // @ - may be disabled, 2 - substr and trim, 8e6 - other variables
+		if (function_exists('memory_get_usage') && ($memory_limit = ini_bytes("memory_limit")) != "-1") {
+			@ini_set("memory_limit", max($memory_limit, 2 * strlen($query) + memory_get_usage() + 8e6)); // @ - may be disabled, 2 - substr and trim, 8e6 - other variables
 		}
 
 		if ($query != "" && strlen($query) < 1e6) { // don't add big queries