diff --git a/content/canvas/src/nsCanvasRenderingContext2D.cpp b/content/canvas/src/nsCanvasRenderingContext2D.cpp
index 735b4586cb9..afc8fe74523 100644
--- a/content/canvas/src/nsCanvasRenderingContext2D.cpp
+++ b/content/canvas/src/nsCanvasRenderingContext2D.cpp
@@ -1754,8 +1754,6 @@ nsCanvasRenderingContext2D::GetMozFillRule(nsAString& aString)
         aString.AssignLiteral("nonzero"); break;
     case gfxContext::FILL_RULE_EVEN_ODD:
         aString.AssignLiteral("evenodd"); break;
-    default:
-        return NS_ERROR_FAILURE;
     }
     return NS_OK;
 }
@@ -2631,9 +2629,6 @@ nsCanvasRenderingContext2D::GetTextAlign(nsAString& ta)
     case TEXT_ALIGN_CENTER:
         ta.AssignLiteral("center");
         break;
-    default:
-        NS_ERROR("textAlign holds invalid value");
-        return NS_ERROR_FAILURE;
     }
 
     return NS_OK;
@@ -2681,9 +2676,6 @@ nsCanvasRenderingContext2D::GetTextBaseline(nsAString& tb)
     case TEXT_BASELINE_BOTTOM:
         tb.AssignLiteral("bottom");
         break;
-    default:
-        NS_ERROR("textBaseline holds invalid value");
-        return NS_ERROR_FAILURE;
     }
 
     return NS_OK;
@@ -2981,9 +2973,6 @@ nsCanvasRenderingContext2D::DrawOrMeasureText(const nsAString& aRawText,
     case TEXT_BASELINE_BOTTOM:
         anchorY = -fontMetrics.emDescent;
         break;
-    default:
-        NS_ERROR("mTextBaseline holds invalid value");
-        return NS_ERROR_FAILURE;
     }
 
     processor.mPt.y += anchorY;
diff --git a/content/canvas/src/nsCanvasRenderingContext2DAzure.cpp b/content/canvas/src/nsCanvasRenderingContext2DAzure.cpp
index 7e7b08773c0..9e89dd4d32e 100644
--- a/content/canvas/src/nsCanvasRenderingContext2DAzure.cpp
+++ b/content/canvas/src/nsCanvasRenderingContext2DAzure.cpp
@@ -1828,8 +1828,6 @@ nsCanvasRenderingContext2DAzure::GetMozFillRule(nsAString& aString)
         aString.AssignLiteral("nonzero"); break;
     case FILL_EVEN_ODD:
         aString.AssignLiteral("evenodd"); break;
-    default:
-        return NS_ERROR_FAILURE;
     }
 
     return NS_OK;
@@ -2843,9 +2841,6 @@ nsCanvasRenderingContext2DAzure::GetTextAlign(nsAString& ta)
   case TEXT_ALIGN_CENTER:
     ta.AssignLiteral("center");
     break;
-  default:
-    NS_ERROR("textAlign holds invalid value");
-    return NS_ERROR_FAILURE;
   }
 
   return NS_OK;
@@ -2893,9 +2888,6 @@ nsCanvasRenderingContext2DAzure::GetTextBaseline(nsAString& tb)
   case TEXT_BASELINE_BOTTOM:
     tb.AssignLiteral("bottom");
     break;
-  default:
-    NS_ERROR("textBaseline holds invalid value");
-    return NS_ERROR_FAILURE;
   }
 
   return NS_OK;
@@ -3285,9 +3277,6 @@ nsCanvasRenderingContext2DAzure::DrawOrMeasureText(const nsAString& aRawText,
   case TEXT_BASELINE_BOTTOM:
     anchorY = -fontMetrics.emDescent;
     break;
-  default:
-    NS_ERROR("mTextBaseline holds invalid value");
-    return NS_ERROR_FAILURE;
   }
 
   processor.mPt.y += anchorY;
@@ -3436,8 +3425,6 @@ nsCanvasRenderingContext2DAzure::GetLineCap(nsAString& capstyle)
   case CAP_SQUARE:
     capstyle.AssignLiteral("square");
     break;
-  default:
-    return NS_ERROR_FAILURE;
   }
 
   return NS_OK;