diff --git a/src/apps/diskusage/Common.h b/src/apps/diskusage/Common.h
index 52c5c77f79..8d92420b11 100644
--- a/src/apps/diskusage/Common.h
+++ b/src/apps/diskusage/Common.h
@@ -56,7 +56,7 @@ EXTERN rgb_color *kBasePieColor;
 
 // Non-resources :)
 PUBLIC_CONST char*	kAppSignature		EQ("application/x-vnd.Haiku-DiskUsage");
-PUBLIC_CONST char*	kHelpFileName		EQ("userguide/en/applications/apps-diskusage.html");
+PUBLIC_CONST char*	kHelpFileName		EQ("userguide/en/applications/diskusage.html");
 PUBLIC_CONST char*	kPieRectAttrName	EQ("mainrect");
 
 PUBLIC_CONST char*	kHelpBtnLabel		EQ("?");