diff --git a/Doxyfile b/Doxyfile
index d61079c5975ef50b86bccdcd03b6967688791133..5eb66f37f5d76f75b56bc7a1854046514e20035d 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1114,13 +1114,6 @@ CLANG_DATABASE_PATH    =
 
 ALPHABETICAL_INDEX     = YES
 
-# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
-# which the alphabetical index list will be split.
-# Minimum value: 1, maximum value: 20, default value: 5.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-COLS_IN_ALPHA_INDEX    = 5
-
 # In case all classes in a project start with a common prefix, all classes will
 # be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
 # can be used to specify a prefix (or a list of prefixes) that should be ignored
diff --git a/v1/Doxyfile b/v1/Doxyfile
index 69477fc1ccb1b68a3dbecd1b59ad4915e782999f..100802aef701b98d8d6cac39fb9563f0240b092a 100644
--- a/v1/Doxyfile
+++ b/v1/Doxyfile
@@ -1111,13 +1111,6 @@ CLANG_DATABASE_PATH    =
 
 ALPHABETICAL_INDEX     = YES
 
-# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
-# which the alphabetical index list will be split.
-# Minimum value: 1, maximum value: 20, default value: 5.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-COLS_IN_ALPHA_INDEX    = 5
-
 # In case all classes in a project start with a common prefix, all classes will
 # be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
 # can be used to specify a prefix (or a list of prefixes) that should be ignored
diff --git a/v2/Doxyfile b/v2/Doxyfile
index 2b8c6f004f4e7305cd3fd2eda7145baa21551348..3de0e1a8bc96db85d64b14461fa53d4e83710387 100644
--- a/v2/Doxyfile
+++ b/v2/Doxyfile
@@ -1111,13 +1111,6 @@ CLANG_DATABASE_PATH    =
 
 ALPHABETICAL_INDEX     = YES
 
-# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
-# which the alphabetical index list will be split.
-# Minimum value: 1, maximum value: 20, default value: 5.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-COLS_IN_ALPHA_INDEX    = 5
-
 # In case all classes in a project start with a common prefix, all classes will
 # be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
 # can be used to specify a prefix (or a list of prefixes) that should be ignored