diff --git a/components/tachart/aggpas/tachartaggpas.pas b/components/tachart/aggpas/tachartaggpas.pas
index b4deeba4ba..59995835bc 100644
--- a/components/tachart/aggpas/tachartaggpas.pas
+++ b/components/tachart/aggpas/tachartaggpas.pas
@@ -4,6 +4,7 @@
 
 unit TAChartAggPas;
 
+{$warn 5023 off : no warning about unused units}
 interface
 
 uses
diff --git a/components/tachart/tachartfpvectorial.pas b/components/tachart/tachartfpvectorial.pas
index ca6610d570..8f327b4049 100644
--- a/components/tachart/tachartfpvectorial.pas
+++ b/components/tachart/tachartfpvectorial.pas
@@ -2,8 +2,9 @@
   This source is only used to compile and install the package.
  }
 
-unit TAChartFPVectorial; 
+unit TAChartFPVectorial;
 
+{$warn 5023 off : no warning about unused units}
 interface
 
 uses
@@ -11,10 +12,10 @@ uses
 
 implementation
 
-procedure Register; 
+procedure Register;
 begin
-end; 
+end;
 
 initialization
-  RegisterPackage('TAChartFPVectorial', @Register); 
+  RegisterPackage('TAChartFPVectorial', @Register);
 end.
diff --git a/components/tachart/tachartlazaruspkg.pas b/components/tachart/tachartlazaruspkg.pas
index 409c87f77d..0473aae7a8 100644
--- a/components/tachart/tachartlazaruspkg.pas
+++ b/components/tachart/tachartlazaruspkg.pas
@@ -4,6 +4,7 @@
 
 unit TAChartLazarusPkg;
 
+{$warn 5023 off : no warning about unused units}
 interface
 
 uses
diff --git a/components/tachart/tachartprint.pas b/components/tachart/tachartprint.pas
index 802a016f51..6cfe3a5c7b 100644
--- a/components/tachart/tachartprint.pas
+++ b/components/tachart/tachartprint.pas
@@ -2,8 +2,9 @@
   This source is only used to compile and install the package.
  }
 
-unit TAChartPrint; 
+unit TAChartPrint;
 
+{$warn 5023 off : no warning about unused units}
 interface
 
 uses
@@ -11,10 +12,10 @@ uses
 
 implementation
 
-procedure Register; 
+procedure Register;
 begin
-end; 
+end;
 
 initialization
-  RegisterPackage('TAChartPrint', @Register); 
+  RegisterPackage('TAChartPrint', @Register);
 end.
diff --git a/components/tachart/tachartwmf.pas b/components/tachart/tachartwmf.pas
index 124162a99d..2c8ec4f7d5 100644
--- a/components/tachart/tachartwmf.pas
+++ b/components/tachart/tachartwmf.pas
@@ -2,8 +2,9 @@
   This source is only used to compile and install the package.
  }
 
-unit TAChartWMF; 
+unit TAChartWMF;
 
+{$warn 5023 off : no warning about unused units}
 interface
 
 uses
@@ -11,10 +12,10 @@ uses
 
 implementation
 
-procedure Register; 
+procedure Register;
 begin
-end; 
+end;
 
 initialization
-  RegisterPackage('TAChartWMF', @Register); 
+  RegisterPackage('TAChartWMF', @Register);
 end.