diff --git a/scripts/doc/irrlicht/doxygen-pdf.cfg b/scripts/doc/irrlicht/doxygen-pdf.cfg
index a47a9aa7..66402cfa 100644
--- a/scripts/doc/irrlicht/doxygen-pdf.cfg
+++ b/scripts/doc/irrlicht/doxygen-pdf.cfg
@@ -184,7 +184,7 @@ SEPARATE_MEMBER_PAGES  = NO
 # The TAB_SIZE tag can be used to set the number of spaces in a tab.
 # Doxygen uses this value to replace tabs by spaces in code fragments.
 
-TAB_SIZE               = 8
+TAB_SIZE               = 4
 
 # This tag can be used to specify a number of aliases that acts
 # as commands in the documentation. An alias has the form "name=value".
diff --git a/scripts/doc/irrlicht/doxygen.cfg b/scripts/doc/irrlicht/doxygen.cfg
index 90b2b17a..e04973aa 100644
--- a/scripts/doc/irrlicht/doxygen.cfg
+++ b/scripts/doc/irrlicht/doxygen.cfg
@@ -184,7 +184,7 @@ SEPARATE_MEMBER_PAGES  = NO
 # The TAB_SIZE tag can be used to set the number of spaces in a tab.
 # Doxygen uses this value to replace tabs by spaces in code fragments.
 
-TAB_SIZE               = 8
+TAB_SIZE               = 4
 
 # This tag can be used to specify a number of aliases that acts
 # as commands in the documentation. An alias has the form "name=value".