diff --git a/docs/bin/ln-sphinx-subprojects b/docs/bin/ln-sphinx-subprojects
index 0f1d4eb..91d806f 100755
--- a/docs/bin/ln-sphinx-subprojects
+++ b/docs/bin/ln-sphinx-subprojects
@@ -1,30 +1,30 @@
 #!/bin/bash
 set -e
 
 create_links () {
     for pymodule in $(cd ../../ && bin/ls-py-modules) ; do
-	if [ "$pymodule" = 'swh-docs' ] ; then
-	    continue
-	fi
-	if [ ! -e "$pymodule" -a -d "../../${pymodule}/docs" ] ; then
-	    ln -s "../../${pymodule}/docs" "$pymodule"
-	fi
+        if [ "$pymodule" = 'swh-docs' ] ; then
+            continue
+        fi
+        if [ ! -e "$pymodule" -a -d "../../${pymodule}/docs" ] ; then
+            ln -s "../../${pymodule}/docs" "$pymodule"
+        fi
     done
 }
 
 remove_links () {
     for pymodule in $(cd ../../ && bin/ls-py-modules) ; do
-	if [ "$pymodule" = 'swh-docs' ] ; then
-	    continue
-	fi
-	if [ -L "$pymodule" ] ; then
-	    rm "$pymodule"
-	fi
+        if [ "$pymodule" = 'swh-docs' ] ; then
+            continue
+        fi
+        if [ -L "$pymodule" ] ; then
+            rm "$pymodule"
+        fi
     done
 }
 
 if [ "$1" = "--remove" ] ; then
     remove_links
 else
     create_links
 fi