diff --git a/src/include/final/fspinbox.h b/src/include/final/fspinbox.h
index 3371f07d..c891d35f 100644
--- a/src/include/final/fspinbox.h
+++ b/src/include/final/fspinbox.h
@@ -169,11 +169,11 @@ inline sInt64 FSpinBox::getValue()
 { return value; }
 
 //----------------------------------------------------------------------
-FString FSpinBox::getPrefix() const
+inline FString FSpinBox::getPrefix() const
 { return pfix; }
 
 //----------------------------------------------------------------------
-FString FSpinBox::getSuffix() const
+inline FString FSpinBox::getSuffix() const
 { return sfix; }
 
 //----------------------------------------------------------------------