diff --git a/layout/reftests/bugs/956513-1-ref.svg b/layout/reftests/bugs/956513-1-ref.svg
new file mode 100644
index 000000000000..c9f39b529702
--- /dev/null
+++ b/layout/reftests/bugs/956513-1-ref.svg
@@ -0,0 +1,10 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <path id="p" d="M0 100h400"/>
+  <path d="M0 102h400" stroke="blue" stroke-width="1px"/>
+  <circle cx="200" cy="102" r="3" fill="blue"/>
+  <text><textPath font-size="16px" text-anchor="middle" startOffset="50%" xlink:href="#p">Text should be centered on the line.</textPath></text>
+</svg>
diff --git a/layout/reftests/bugs/956513-1.svg b/layout/reftests/bugs/956513-1.svg
new file mode 100644
index 000000000000..f7980a0781dc
--- /dev/null
+++ b/layout/reftests/bugs/956513-1.svg
@@ -0,0 +1,10 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <path id="p" d="M0 100h400"/>
+  <path d="M0 102h400" stroke="blue" stroke-width="1px"/>
+  <circle cx="200" cy="102" r="3" fill="blue"/>
+  <text xml:space="preserve"> <textPath font-size="16px" text-anchor="middle" startOffset="50%" xlink:href="#p">Text should be centered on the line.</textPath> </text>
+</svg>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index c0a4b4280e14..51d3b4bb42b7 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1791,4 +1791,5 @@ fuzzy-if(OSX==10.6,2,30) == 933264-1.html 933264-1-ref.html
 == 941940-1.html 941940-1-ref.html
 == 942017.html 942017-ref.html
 == 942672-1.html 942672-1-ref.html
+== 956513-1.svg 956513-1-ref.svg
 == 944291-1.html 944291-1-ref.html
diff --git a/layout/svg/SVGTextFrame.cpp b/layout/svg/SVGTextFrame.cpp
index 3fff4b24730d..3834a4987280 100644
--- a/layout/svg/SVGTextFrame.cpp
+++ b/layout/svg/SVGTextFrame.cpp
@@ -4326,6 +4326,7 @@ SVGTextFrame::ResolvePositions(nsIContent* aContent,
     // only if they actually have some text content.
     if (HasTextContent(aContent)) {
       mPositions[aIndex].mPosition = gfxPoint();
+      mPositions[aIndex].mStartOfChunk = true;
     }
   } else if (aContent->Tag() != nsGkAtoms::a) {
     // We have a text content element that can have x/y/dx/dy/rotate attributes.