diff --git a/Source/WebCore/html/HTMLProgressElement.cpp b/Source/WebCore/html/HTMLProgressElement.cpp
index 8b40e1d..6a721d5 100644
--- a/Source/WebCore/html/HTMLProgressElement.cpp
+++ b/Source/WebCore/html/HTMLProgressElement.cpp
@@ -98,7 +98,7 @@
 
 void HTMLProgressElement::setValue(double value)
 {
-    setAttributeWithoutSynchronization(valueAttr, AtomicString::number(value >= 0 ? value : 0));
+    setAttributeWithoutSynchronization(valueAttr, AtomicString::number(value));
 }
 
 double HTMLProgressElement::max() const
@@ -109,7 +109,8 @@
 
 void HTMLProgressElement::setMax(double max)
 {
-    setAttributeWithoutSynchronization(maxAttr, AtomicString::number(max > 0 ? max : 1));
+    if (max > 0)
+        setAttributeWithoutSynchronization(maxAttr, AtomicString::number(max));
 }
 
 double HTMLProgressElement::position() const