diff --git a/dist/debian/valentina.1 b/dist/debian/valentina.1
index e10730fec..715019661 100644
--- a/dist/debian/valentina.1
+++ b/dist/debian/valentina.1
@@ -25,8 +25,8 @@ The path to output destination folder. By default the directory at which the app
 .RB "Path to custom measure file (" "export mode" ")."
 .IP "-n, --time <Time>"
 .RB "<Time> in minutes given for the algorithm to find best layout (" "export mode" "). Time must be in range from 1 minute to 60 minutes. Default value 1 minute."
-.IP "--сoefficient <Coefficient>"
-.RB "Set layout efficiency coefficient (" "export mode" "). Layout efficiency coefficient is the ratio of the area occupied by the pieces to the bounding rect of all pieces. If nesting reaches required level the process stops. If value is 0 no check will be made. Сoefficient must be in range from 0 to 100. Default value 0."
+.IP "--coefficient <Coefficient>"
+.RB "Set layout efficiency coefficient (" "export mode" "). Layout efficiency coefficient is the ratio of the area occupied by the pieces to the bounding rect of all pieces. If nesting reaches required level the process stops. If value is 0 no check will be made. Coefficient must be in range from 0 to 100. Default value 0."
 .IP "-f, --format <Format number>" 
 .RB "Number corresponding to output format (default = 0, " "export mode" "):" 
 .RS 
diff --git a/src/app/valentina/core/vcmdexport.cpp b/src/app/valentina/core/vcmdexport.cpp
index 6d3790dd5..dcebaa3c2 100644
--- a/src/app/valentina/core/vcmdexport.cpp
+++ b/src/app/valentina/core/vcmdexport.cpp
@@ -596,7 +596,7 @@ void VCommandLine::InitCommandLineOptions()
         {LONG_OPTION_EFFICIENCY_COEFFICIENT,
          translate("VCommandLine", "Set layout efficiency <coefficient>. Layout efficiency coefficient is the ratio of "
          "the area occupied by the pieces to the bounding rect of all pieces. If nesting reaches required level the "
-         "process stops. If value is 0 no check will be made. Сoefficient must be in range from 0 to 100. Default "
+         "process stops. If value is 0 no check will be made. Coefficient must be in range from 0 to 100. Default "
          "value 0."),
          translate("VCommandLine", "Coefficient")},
         {{SINGLE_OPTION_EXP2FORMAT, LONG_OPTION_EXP2FORMAT},
@@ -795,7 +795,7 @@ qreal VCommandLine::OptEfficiencyCoefficient() const
 
         if (not ok || coefficient < 0 || coefficient > 100)
         {
-            qCritical() << translate("VCommandLine", "Сoefficient must be in range from 0 to 100.")
+            qCritical() << translate("VCommandLine", "Coefficient must be in range from 0 to 100.")
                         << "\n";
             const_cast<VCommandLine*>(this)->parser.showHelp(V_EX_USAGE);
         }
diff --git a/src/libs/vmisc/commandoptions.cpp b/src/libs/vmisc/commandoptions.cpp
index adad0961b..0fdab48c4 100644
--- a/src/libs/vmisc/commandoptions.cpp
+++ b/src/libs/vmisc/commandoptions.cpp
@@ -112,7 +112,7 @@ const QString SINGLE_OPTION_BOTTOM_MARGIN   = QStringLiteral("B");
 const QString LONG_OPTION_NESTING_TIME      = QStringLiteral("time");
 const QString SINGLE_OPTION_NESTING_TIME    = QStringLiteral("n");
 
-const QString LONG_OPTION_EFFICIENCY_COEFFICIENT  = QStringLiteral("сoefficient");
+const QString LONG_OPTION_EFFICIENCY_COEFFICIENT  = QStringLiteral("coefficient");
 
 const QString LONG_OPTION_CSVWITHHEADER = QStringLiteral("csvWithHeader");
 const QString LONG_OPTION_CSVCODEC      = QStringLiteral("csvCodec");
diff --git a/src/test/CollectionTest/tst_valentinacommandline.cpp b/src/test/CollectionTest/tst_valentinacommandline.cpp
index 97400e422..a75cf6a03 100644
--- a/src/test/CollectionTest/tst_valentinacommandline.cpp
+++ b/src/test/CollectionTest/tst_valentinacommandline.cpp
@@ -135,27 +135,27 @@ void TST_ValentinaCommandLine::ExportMode_data() const
     const QString tmp = QCoreApplication::applicationDirPath() + QDir::separator() + *tmpTestFolder;
 
     QTest::newRow("Issue #372")<< "issue_372.val"
-                               << QString("-p;;0;;-d;;%1;;-b;;output;;--сoefficient;;1").arg(tmp)
+                               << QString("-p;;0;;-d;;%1;;-b;;output;;--coefficient;;1").arg(tmp)
                                << V_EX_OK;
 
     QTest::newRow("A file with limited gradation. Multisize measurements. Wrong data.")
             << "glimited_vst.val"
-            << QString("-p;;0;;-d;;%1;;--gsize;;46;;--gheight;;164;;-b;;output;;--сoefficient;;1").arg(tmp)
+            << QString("-p;;0;;-d;;%1;;--gsize;;46;;--gheight;;164;;-b;;output;;--coefficient;;1").arg(tmp)
             << V_EX_DATAERR;
 
     QTest::newRow("A file with limited gradation. Multisize measurements. Correct data.")
             << "glimited_vst.val"
-            << QString("-p;;0;;-d;;%1;;--gsize;;40;;--gheight;;134;;-b;;output;;--сoefficient;;1").arg(tmp)
+            << QString("-p;;0;;-d;;%1;;--gsize;;40;;--gheight;;134;;-b;;output;;--coefficient;;1").arg(tmp)
             << V_EX_OK;
 
     QTest::newRow("A file with limited gradation. Individual measurements.")
             << "glimited_vit.val"
-            << QString("-p;;0;;-d;;%1;;--gsize;;40;;--gheight;;134;;-b;;output;;--сoefficient;;1").arg(tmp)
+            << QString("-p;;0;;-d;;%1;;--gsize;;40;;--gheight;;134;;-b;;output;;--coefficient;;1").arg(tmp)
             << V_EX_DATAERR;
 
     QTest::newRow("A file with limited gradation. No measurements.")
             << "glimited_no_m.val"
-            << QString("-p;;0;;-d;;%1;;--gsize;;40;;--gheight;;134;;-b;;output;;--сoefficient;;1").arg(tmp)
+            << QString("-p;;0;;-d;;%1;;--gsize;;40;;--gheight;;134;;-b;;output;;--coefficient;;1").arg(tmp)
             << V_EX_DATAERR;
 }