diff --git a/layout/svg/base/src/nsSVGFilterFrame.cpp b/layout/svg/base/src/nsSVGFilterFrame.cpp
index 58e8c817750b..0fbbce65c455 100644
--- a/layout/svg/base/src/nsSVGFilterFrame.cpp
+++ b/layout/svg/base/src/nsSVGFilterFrame.cpp
@@ -116,7 +116,7 @@ NS_INTERFACE_MAP_BEGIN(nsSVGFilterFrame)
   NS_INTERFACE_MAP_ENTRY(nsISVGValue)
   NS_INTERFACE_MAP_ENTRY(nsISVGFilterFrame)
   NS_INTERFACE_MAP_ENTRY(nsISVGValueObserver)
-  NS_INTERFACE_MAP_ENTRY(nsSupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISVGValue)
 NS_INTERFACE_MAP_END_INHERITING(nsSVGFilterFrameBase)
 
diff --git a/layout/svg/base/src/nsSVGGFrame.cpp b/layout/svg/base/src/nsSVGGFrame.cpp
index be0f1f0739be..31f6dd900a0b 100644
--- a/layout/svg/base/src/nsSVGGFrame.cpp
+++ b/layout/svg/base/src/nsSVGGFrame.cpp
@@ -52,7 +52,7 @@
 
 NS_INTERFACE_MAP_BEGIN(nsSVGGFrame)
   NS_INTERFACE_MAP_ENTRY(nsISVGValueObserver)
-  NS_INTERFACE_MAP_ENTRY(nsSupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
 NS_INTERFACE_MAP_END_INHERITING(nsSVGDisplayContainerFrame)
 
 //----------------------------------------------------------------------
diff --git a/layout/svg/base/src/nsSVGTextPathFrame.cpp b/layout/svg/base/src/nsSVGTextPathFrame.cpp
index 6b72b74b8c49..95af308e4d5f 100644
--- a/layout/svg/base/src/nsSVGTextPathFrame.cpp
+++ b/layout/svg/base/src/nsSVGTextPathFrame.cpp
@@ -49,7 +49,7 @@
 
 NS_INTERFACE_MAP_BEGIN(nsSVGTextPathFrame)
   NS_INTERFACE_MAP_ENTRY(nsISVGValueObserver)
-  NS_INTERFACE_MAP_ENTRY(nsSupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
 NS_INTERFACE_MAP_END_INHERITING(nsSVGTextPathFrameBase)
 
 //----------------------------------------------------------------------