diff --git a/railties/guides/source/association_basics.textile b/railties/guides/source/association_basics.textile
index 3fce595794..3c03c825cd 100644
--- a/railties/guides/source/association_basics.textile
+++ b/railties/guides/source/association_basics.textile
@@ -724,7 +724,7 @@ NOTE: There's no need to use +:include+ for immediate associations - that is, if
 
 h6. +:polymorphic+
 
-Passing +true+ to the +:polymorphic+ option indicates that this is a polymorphic association. Polymorphic associations were discussed in detail <a href="#polymorphic-associations">earlier in this guide</a>.
+Passing +true+ to the +:polymorphic+ option indicates that this is a polymorphic association. Polymorphic associations were discussed in detail <a href="#polymorphicassociations">earlier in this guide</a>.
 
 h6. +:readonly+
 
@@ -848,7 +848,7 @@ The +has_one+ association supports these options:
 
 h6. +:as+
 
-Setting the +:as+ option indicates that this is a polymorphic association. Polymorphic associations were discussed in detail <a href="#polymorphic-associations">earlier in this guide</a>.
+Setting the +:as+ option indicates that this is a polymorphic association. Polymorphic associations were discussed in detail <a href="#polymorphicassociations">earlier in this guide</a>.
 
 h6. +:autosave+
 
@@ -952,7 +952,7 @@ The +:source_type+ option specifies the source association type for a +has_one :
 
 h6. :through
 
-The +:through+ option specifies a join model through which to perform the query. +has_one :through+ associations were discussed in detail <a href="#thehas-onethrough-association">earlier in this guide</a>.
+The +:through+ option specifies a join model through which to perform the query. +has_one :through+ associations were discussed in detail <a href="#thehas-onethroughassociation">earlier in this guide</a>.
 
 h6. +:validate+
 
@@ -1158,7 +1158,7 @@ The +has_many+ association supports these options:
 
 h6. +:as+
 
-Setting the +:as+ option indicates that this is a polymorphic association, as discussed <a href="#polymorphic-associations">earlier in this guide</a>.
+Setting the +:as+ option indicates that this is a polymorphic association, as discussed <a href="#polymorphicassociations">earlier in this guide</a>.
 
 h6. +:autosave+
 
@@ -1210,7 +1210,7 @@ NOTE: This option is ignored when you use the +:through+ option on the associati
 
 h6. +:extend+
 
-The +:extend+ option specifies a named module to extend the association proxy. Association extensions are discussed in detail <a href="#association-extensions">later in this guide</a>.
+The +:extend+ option specifies a named module to extend the association proxy. Association extensions are discussed in detail <a href="#associationextensions">later in this guide</a>.
 
 h6. +:finder_sql+
 
@@ -1323,7 +1323,7 @@ The +:source_type+ option specifies the source association type for a +has_many
 
 h6. +:through+
 
-The +:through+ option specifies a join model through which to perform the query. +has_many :through+ associations provide a way to implement many-to-many relationships, as discussed <a href="#thehas-manythrough-association">earlier in this guide</a>.
+The +:through+ option specifies a join model through which to perform the query. +has_many :through+ associations provide a way to implement many-to-many relationships, as discussed <a href="#thehas-manythroughassociation">earlier in this guide</a>.
 
 h6. +:uniq+
 
@@ -1589,7 +1589,7 @@ Normally Rails automatically generates the proper SQL to remove links between th
 
 h6. +:extend+
 
-The +:extend+ option specifies a named module to extend the association proxy. Association extensions are discussed in detail <a href="#association-extensions">later in this guide</a>.
+The +:extend+ option specifies a named module to extend the association proxy. Association extensions are discussed in detail <a href="#associationextensions">later in this guide</a>.
 
 h6. +:finder_sql+