diff --git a/scaddins/source/analysis/analysis.hxx b/scaddins/source/analysis/analysis.hxx
index 841979f99b36..9ba02bad0160 100644
--- a/scaddins/source/analysis/analysis.hxx
+++ b/scaddins/source/analysis/analysis.hxx
@@ -34,9 +34,6 @@
 
 #include <memory>
 
-namespace com::sun::star::lang { class XMultiServiceFactory; }
-namespace com::sun::star::sheet { struct LocalizedName; }
-
 typedef cppu::WeakComponentImplHelper<
                             css::sheet::XAddIn,
                             css::sheet::XCompatibilityNames,
diff --git a/scaddins/source/datefunc/datefunc.hxx b/scaddins/source/datefunc/datefunc.hxx
index 0dd6b5fa2f1c..2387daf3bbe8 100644
--- a/scaddins/source/datefunc/datefunc.hxx
+++ b/scaddins/source/datefunc/datefunc.hxx
@@ -32,8 +32,6 @@
 #include <cppuhelper/implbase.hxx>
 #include <unotools/resmgr.hxx>
 
-namespace com::sun::star::lang { class XMultiServiceFactory; }
-
 enum class ScaCategory
 {
     DateTime,
diff --git a/scaddins/source/pricing/pricing.hxx b/scaddins/source/pricing/pricing.hxx
index 92f2e553a9f0..ff099265f13a 100644
--- a/scaddins/source/pricing/pricing.hxx
+++ b/scaddins/source/pricing/pricing.hxx
@@ -37,8 +37,6 @@
 #include <cppuhelper/implbase.hxx>
 #include <unotools/resmgr.hxx>
 
-namespace com::sun::star::lang { class XMultiServiceFactory; }
-
 
 namespace sca::pricing {