diff --git a/components/tachart/languages/tachartstrconsts.de.po b/components/tachart/languages/tachartstrconsts.de.po
index e6f806a704..2fc0b348d0 100644
--- a/components/tachart/languages/tachartstrconsts.de.po
+++ b/components/tachart/languages/tachartstrconsts.de.po
@@ -105,6 +105,10 @@ msgstr "Distanzmessung"
 msgid "Function series"
 msgstr "Funktions-Diagramm"
 
+#: tachartstrconsts.rsinvalidlogbase
+msgid "Logarithm base must be > 0 and <> 1."
+msgstr "Die Logarithmus-Basis muss größer als 0 und darf nicht gleich 1 sein."
+
 #: tachartstrconsts.rsleastsquaresfitseries
 msgid "Least-squares fit series"
 msgstr "Fit"
diff --git a/components/tachart/languages/tachartstrconsts.fi.po b/components/tachart/languages/tachartstrconsts.fi.po
index b17b34f4ca..241017ca4a 100644
--- a/components/tachart/languages/tachartstrconsts.fi.po
+++ b/components/tachart/languages/tachartstrconsts.fi.po
@@ -93,6 +93,10 @@ msgstr "Etäisyysmittaus"
 msgid "Function series"
 msgstr "Funktiokuvaaja"
 
+#: tachartstrconsts.rsinvalidlogbase
+msgid "Logarithm base must be > 0 and <> 1."
+msgstr ""
+
 #: tachartstrconsts.rsleastsquaresfitseries
 msgid "Least-squares fit series"
 msgstr "Pienimpään neliösummaan sopiva kuvaaja"
diff --git a/components/tachart/languages/tachartstrconsts.fr.po b/components/tachart/languages/tachartstrconsts.fr.po
index f2366aa251..3569bd819b 100644
--- a/components/tachart/languages/tachartstrconsts.fr.po
+++ b/components/tachart/languages/tachartstrconsts.fr.po
@@ -103,6 +103,10 @@ msgstr "Mesure des distances"
 msgid "Function series"
 msgstr "Séries de fonctions"
 
+#: tachartstrconsts.rsinvalidlogbase
+msgid "Logarithm base must be > 0 and <> 1."
+msgstr ""
+
 #: tachartstrconsts.rsleastsquaresfitseries
 msgid "Least-squares fit series"
 msgstr "Séries de moindres carrés ajustés"
diff --git a/components/tachart/languages/tachartstrconsts.po b/components/tachart/languages/tachartstrconsts.po
index 91e1ca7ab2..5550bde5e8 100644
--- a/components/tachart/languages/tachartstrconsts.po
+++ b/components/tachart/languages/tachartstrconsts.po
@@ -93,6 +93,10 @@ msgstr ""
 msgid "Function series"
 msgstr ""
 
+#: tachartstrconsts.rsinvalidlogbase
+msgid "Logarithm base must be > 0 and <> 1."
+msgstr ""
+
 #: tachartstrconsts.rsleastsquaresfitseries
 msgid "Least-squares fit series"
 msgstr ""
diff --git a/components/tachart/languages/tachartstrconsts.ru.po b/components/tachart/languages/tachartstrconsts.ru.po
index ea11e90f20..549a110ec5 100644
--- a/components/tachart/languages/tachartstrconsts.ru.po
+++ b/components/tachart/languages/tachartstrconsts.ru.po
@@ -103,6 +103,10 @@ msgstr "Измерение расстояния"
 msgid "Function series"
 msgstr "Диаграмма по функции"
 
+#: tachartstrconsts.rsinvalidlogbase
+msgid "Logarithm base must be > 0 and <> 1."
+msgstr "Основание логарифма должно быть больше нуля и не равно единице."
+
 #: tachartstrconsts.rsleastsquaresfitseries
 msgid "Least-squares fit series"
 msgstr "Диаграмма по методу наименьших квадратов"
@@ -200,4 +204,3 @@ msgstr "Невозможно переименовать компоненты: %s
 #: tachartstrconsts.tastoolseditortitle
 msgid "Edit tools"
 msgstr "Редактор средств диаграмм"
-
diff --git a/components/tachart/languages/tachartstrconsts.se.po b/components/tachart/languages/tachartstrconsts.se.po
index b20d427f13..4a9ba6c35a 100644
--- a/components/tachart/languages/tachartstrconsts.se.po
+++ b/components/tachart/languages/tachartstrconsts.se.po
@@ -106,6 +106,10 @@ msgstr "Avståndsmätning"
 msgid "Function series"
 msgstr "Funktionskurva"
 
+#: tachartstrconsts.rsinvalidlogbase
+msgid "Logarithm base must be > 0 and <> 1."
+msgstr ""
+
 #: tachartstrconsts.rsleastsquaresfitseries
 msgid "Least-squares fit series"
 msgstr "Least-squares fit kurva"
diff --git a/components/tachart/tachartstrconsts.pas b/components/tachart/tachartstrconsts.pas
index 333dbde227..0a251b41ce 100644
--- a/components/tachart/tachartstrconsts.pas
+++ b/components/tachart/tachartstrconsts.pas
@@ -64,6 +64,7 @@ resourcestring
   rsLinear = 'Linear';
   rsLogarithmic = 'Logarithmic';
   rsUserDefined = 'User-defined';
+  rsInvalidLogBase = 'Logarithm base must be > 0 and <> 1.';
 
   // ChartUtils
   tasFailedSubcomponentRename = 'Failed to rename components: %s';
diff --git a/components/tachart/tatransformations.pas b/components/tachart/tatransformations.pas
index 6e6e021c6f..4d03a6af31 100644
--- a/components/tachart/tatransformations.pas
+++ b/components/tachart/tatransformations.pas
@@ -656,6 +656,8 @@ end;
 procedure TLogarithmAxisTransform.SetBase(AValue: Double);
 begin
   if FBase = AValue then exit;
+  if (AValue <= 0) or (AValue = 1.0) then
+    raise Exception.Create(rsInvalidLogBase);
   FBase := AValue;
   Changed;
 end;