diff --git a/mozilla/gfx/src/beos/nsRenderingContextBeOS.cpp b/mozilla/gfx/src/beos/nsRenderingContextBeOS.cpp
index e37ae7c1e0a..907635deb16 100644
--- a/mozilla/gfx/src/beos/nsRenderingContextBeOS.cpp
+++ b/mozilla/gfx/src/beos/nsRenderingContextBeOS.cpp
@@ -1086,3 +1086,30 @@ NS_IMETHODIMP nsRenderingContextBeOS::CopyOffScreenBits(nsDrawingSurface aSrcSur
 NS_IMETHODIMP nsRenderingContextBeOS::RetrieveCurrentNativeGraphicData(PRUint32 *ngd) {
 	return NS_OK;
 }
+
+
+
+#ifdef MOZ_MATHML
+  /**
+   * Returns metrics (in app units) of an 8-bit character string
+   */
+NS_IMETHODIMP 
+nsRenderingContextBeOS::GetBoundingMetrics(const char*        aString,
+                                         PRUint32           aLength,
+                                         nsBoundingMetrics& aBoundingMetrics) {
+  // Fill me up 
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+  /**
+   * Returns metrics (in app units) of a Unicode character string
+   */
+NS_IMETHODIMP 
+nsRenderingContextBeOS::GetBoundingMetrics(const PRUnichar*   aString,
+                                         PRUint32           aLength,
+                                         nsBoundingMetrics& aBoundingMetrics,
+                                         PRInt32*           aFontID) {
+  // Fill me up 
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+#endif /* MOZ_MATHML */
diff --git a/mozilla/gfx/src/beos/nsRenderingContextBeOS.h b/mozilla/gfx/src/beos/nsRenderingContextBeOS.h
index 01a77460608..5b435904a47 100644
--- a/mozilla/gfx/src/beos/nsRenderingContextBeOS.h
+++ b/mozilla/gfx/src/beos/nsRenderingContextBeOS.h
@@ -186,6 +186,23 @@ public:
 			mClipRegion->SetTo(0, 0, w, h);
 		}
 	}
+
+#ifdef MOZ_MATHML
+  /**
+   * Returns metrics (in app units) of an 8-bit character string
+   */
+  NS_IMETHOD GetBoundingMetrics(const char*        aString,
+                                PRUint32           aLength,
+                                nsBoundingMetrics& aBoundingMetrics);
+  
+  /**
+   * Returns metrics (in app units) of a Unicode character string
+   */
+  NS_IMETHOD GetBoundingMetrics(const PRUnichar*   aString,
+                                PRUint32           aLength,
+                                nsBoundingMetrics& aBoundingMetrics,
+                                PRInt32*           aFontID = nsnull);
+#endif /* MOZ_MATHML */
 	
 protected:
 	NS_IMETHOD CommonInit();