diff --git a/components/number.inc b/components/number.inc
index d8434d0..4edd344 100644
--- a/components/number.inc
+++ b/components/number.inc
@@ -245,7 +245,7 @@ function theme_webform_number($variables) {
   }
 
   // Step property *must* be a full number with 0 prefix if a decimal.
-  if (!empty($element['#step']) && !is_int($element['#step'] * 1)) {
+  if (!empty($element['#step']) && ((int)$element['#step'] != $element['#step'])) {
     $decimals = strlen($element['#step']) - strrpos($element['#step'], '.') - 1;
     $element['#step'] = sprintf('%1.' . $decimals . 'F', $element['#step']);
   }
@@ -315,7 +315,7 @@ function _webform_render_number($component, $value = NULL, $filter = TRUE, $subm
   }
 
   // Ensure #step starts with a zero if a decimal.
-  if (!is_int($element['#step'] * 1)) {
+  if ((int)$element['#step'] != $element['#step']) {
     $decimals = strlen($element['#step']) - strrpos($element['#step'], '.') - 1;
     $element['#step'] = sprintf('%1.' . $decimals . 'F', $element['#step']);
   }
@@ -641,7 +641,7 @@ function _webform_validate_number($element, &$form_state) {
       }
 
       // Integer test.
-      if ($element['#integer'] && !is_int($numeric_value * 1)) {
+      if ($element['#integer'] && ((int)$numeric_value != $numeric_value)) {
         form_error($element, t('!name field value of @value must be an integer.', array('!name' => $element['#title'], '@value' => $value)));
       }
 
@@ -705,7 +705,7 @@ function _webform_edit_number_validate($element, &$form_state) {
         if (!is_numeric($values['min'])) {
           form_error($element, t('Minimum must be numeric.'));
         }
-        if ($values['integer'] && !is_int($values['min'] * 1)) {
+        if ($values['integer'] && ((int)$values['min'] != $values['min'])) {
           form_error($element, t('Minimum must have an integer value.'));
         }
       }
@@ -720,7 +720,7 @@ function _webform_edit_number_validate($element, &$form_state) {
         if (!is_numeric($values['max'])) {
           form_error($element, t('Maximum must be numeric.'));
         }
-        if ($values['integer'] && !is_int($values['max'] * 1)) {
+        if ($values['integer'] && ((int)$values['max'] != $values['max'])) {
           form_error($element, t('Maximum must have an integer value.'));
         }
       }
@@ -731,7 +731,7 @@ function _webform_edit_number_validate($element, &$form_state) {
           form_error($element, t('Step must be numeric.'));
         }
         else {
-          if ($values['integer'] && !is_int($values['step'] * 1)) {
+          if ($values['integer'] && ((int)$values['step'] != $values['step'])) {
             form_error($element, t('Step must have an integer value.'));
           }
         }