diff --git a/doc/native_protocol_v1.spec b/doc/native_protocol_v1.spec
index 4e63222d5c..9c9b6b52ce 100644
--- a/doc/native_protocol_v1.spec
+++ b/doc/native_protocol_v1.spec
@@ -688,8 +688,8 @@ Table of Contents
                      the exception.
                 <received> is an [int] representing the number of nodes having
                            acknowledged the request.
-                <blockfor> is the number of replica whose acknowledgement is
-                           required to achieve <cl>.
+                <blockfor> is an [int] representing the number of replica whose
+                           acknowledgement is required to achieve <cl>.
                 <writeType> is a [string] that describe the type of the write
                             that timeouted. The value of that string can be one
                             of:
@@ -714,9 +714,9 @@ Table of Contents
                      the exception.
                 <received> is an [int] representing the number of nodes having
                            answered the request.
-                <blockfor> is the number of replica whose response is
-                           required to achieve <cl>. Please note that it is
-                           possible to have <received> >= <blockfor> if
+                <blockfor> is an [int] representing the number of replicas whose
+                           response is required to achieve <cl>. Please note that it
+                           is possible to have <received> >= <blockfor> if
                            <data_present> is false. And also in the (unlikely)
                            case were <cl> is achieved but the coordinator node
                            timeout while waiting for read-repair
diff --git a/doc/native_protocol_v2.spec b/doc/native_protocol_v2.spec
index 1f55007518..b9cc51f7c0 100644
--- a/doc/native_protocol_v2.spec
+++ b/doc/native_protocol_v2.spec
@@ -872,8 +872,8 @@ Table of Contents
                      the exception.
                 <received> is an [int] representing the number of nodes having
                            acknowledged the request.
-                <blockfor> is the number of replica whose acknowledgement is
-                           required to achieve <cl>.
+                <blockfor> is an [int] representing the number of replica whose
+                           acknowledgement is required to achieve <cl>.
                 <writeType> is a [string] that describe the type of the write
                             that timeouted. The value of that string can be one
                             of:
@@ -898,9 +898,9 @@ Table of Contents
                      the exception.
                 <received> is an [int] representing the number of nodes having
                            answered the request.
-                <blockfor> is the number of replica whose response is
-                           required to achieve <cl>. Please note that it is
-                           possible to have <received> >= <blockfor> if
+                <blockfor> is an [int] representing the number of replica whose
+                           response is required to achieve <cl>. Please note that it
+                           is possible to have <received> >= <blockfor> if
                            <data_present> is false. And also in the (unlikely)
                            case were <cl> is achieved but the coordinator node
                            timeout while waiting for read-repair
diff --git a/doc/native_protocol_v3.spec b/doc/native_protocol_v3.spec
index 9894d76af1..312c8c1923 100644
--- a/doc/native_protocol_v3.spec
+++ b/doc/native_protocol_v3.spec
@@ -954,8 +954,8 @@ Table of Contents
                      the exception.
                 <received> is an [int] representing the number of nodes having
                            acknowledged the request.
-                <blockfor> is the number of replica whose acknowledgement is
-                           required to achieve <cl>.
+                <blockfor> is an [int] representing the number of replica whose
+                           acknowledgement is required to achieve <cl>.
                 <writeType> is a [string] that describe the type of the write
                             that timeouted. The value of that string can be one
                             of:
@@ -980,9 +980,9 @@ Table of Contents
                      the exception.
                 <received> is an [int] representing the number of nodes having
                            answered the request.
-                <blockfor> is the number of replica whose response is
-                           required to achieve <cl>. Please note that it is
-                           possible to have <received> >= <blockfor> if
+                <blockfor> is an [int] representing the number of replica whose
+                           response is required to achieve <cl>. Please note that
+                           it is possible to have <received> >= <blockfor> if
                            <data_present> is false. And also in the (unlikely)
                            case were <cl> is achieved but the coordinator node
                            timeout while waiting for read-repair