diff --git a/mozilla/content/svg/content/src/nsSVGAngle.cpp b/mozilla/content/svg/content/src/nsSVGAngle.cpp
index dddb84abf97..612596ebc07 100644
--- a/mozilla/content/svg/content/src/nsSVGAngle.cpp
+++ b/mozilla/content/svg/content/src/nsSVGAngle.cpp
@@ -317,9 +317,6 @@ nsSVGAngle::SetValueAsString(const nsAString & aValueAsString)
     if (rest!=number) {
       PRUint16 unitType = GetUnitTypeForString(nsCRT::strtok(rest, "\x20\x9\xD\xA", &rest));
       rv = NewValueSpecifiedUnits(unitType, (float)value);
-      if (rv != NS_OK) {
-        NS_ERROR("invalid length type");
-      }
     }
     else { // parse error
       // no number
diff --git a/mozilla/content/svg/content/src/nsSVGLength.cpp b/mozilla/content/svg/content/src/nsSVGLength.cpp
index fa0895ac11a..10c69645e05 100644
--- a/mozilla/content/svg/content/src/nsSVGLength.cpp
+++ b/mozilla/content/svg/content/src/nsSVGLength.cpp
@@ -432,7 +432,6 @@ nsSVGLength::SetValueAsString(const nsAString & aValueAsString)
       else { // parse error
         // not a valid unit type
         rv = NS_ERROR_FAILURE;
-        NS_ERROR("invalid length type");
       }
     }
     else { // parse error
diff --git a/mozilla/content/svg/content/src/nsSVGLength2.cpp b/mozilla/content/svg/content/src/nsSVGLength2.cpp
index 8f32f154c17..f184721cbff 100644
--- a/mozilla/content/svg/content/src/nsSVGLength2.cpp
+++ b/mozilla/content/svg/content/src/nsSVGLength2.cpp
@@ -223,7 +223,6 @@ nsSVGLength2::SetBaseValueString(const nsAString &aValueAsString,
       else { // parse error
         // not a valid unit type
         rv = NS_ERROR_FAILURE;
-        NS_ERROR("invalid length type");
       }
     }
     else { // parse error