diff --git a/pcbnew/dialogs/dialog_copper_zones.cpp b/pcbnew/dialogs/dialog_copper_zones.cpp
index 1a4948bd8e..0f46f2700c 100644
--- a/pcbnew/dialogs/dialog_copper_zones.cpp
+++ b/pcbnew/dialogs/dialog_copper_zones.cpp
@@ -443,7 +443,7 @@ bool DIALOG_COPPER_ZONE::AcceptOptions( bool aPromptForErrors, bool aUseExportab
             (double) m_settings.m_ThermalReliefCopperBridge / IU_PER_MILS );
     }
 
-    if( m_settings.m_ThermalReliefCopperBridge <= m_settings.m_ZoneMinThickness )
+    if( m_settings.m_ThermalReliefCopperBridge < m_settings.m_ZoneMinThickness )
     {
         DisplayError( this,
                      _( "Thermal relief spoke width is smaller than the minimum width." ) );