diff --git a/vector/src/Data/Vector.hs b/vector/src/Data/Vector.hs
index 5a6f89cb..77d3d98e 100644
--- a/vector/src/Data/Vector.hs
+++ b/vector/src/Data/Vector.hs
@@ -998,7 +998,7 @@ accumulate :: (a -> b -> a)  -- ^ accumulating function @f@
 accumulate = G.accumulate
 
 -- | /O(m+min(n1,n2))/ For each index @i@ from the index vector and the
--- corresponding value @b@ from the the value vector,
+-- corresponding value @b@ from the value vector,
 -- replace the element of the initial vector at
 -- position @i@ by @f a b@.
 --
diff --git a/vector/src/Data/Vector/Generic.hs b/vector/src/Data/Vector/Generic.hs
index de32de12..37abc7a3 100644
--- a/vector/src/Data/Vector/Generic.hs
+++ b/vector/src/Data/Vector/Generic.hs
@@ -926,7 +926,7 @@ accumulate :: (Vector v a, Vector v (Int, b))
 accumulate f v us = accum_stream f v (stream us)
 
 -- | /O(m+min(n1,n2))/ For each index @i@ from the index vector and the
--- corresponding value @b@ from the the value vector,
+-- corresponding value @b@ from the value vector,
 -- replace the element of the initial vector at
 -- position @i@ by @f a b@.
 --
diff --git a/vector/src/Data/Vector/Primitive.hs b/vector/src/Data/Vector/Primitive.hs
index 981f3abe..1be565db 100644
--- a/vector/src/Data/Vector/Primitive.hs
+++ b/vector/src/Data/Vector/Primitive.hs
@@ -802,7 +802,7 @@ accum :: Prim a
 accum = G.accum
 
 -- | /O(m+min(n1,n2))/ For each index @i@ from the index vector and the
--- corresponding value @b@ from the the value vector,
+-- corresponding value @b@ from the value vector,
 -- replace the element of the initial vector at
 -- position @i@ by @f a b@.
 --
diff --git a/vector/src/Data/Vector/Storable.hs b/vector/src/Data/Vector/Storable.hs
index 4a052a07..deb89d56 100644
--- a/vector/src/Data/Vector/Storable.hs
+++ b/vector/src/Data/Vector/Storable.hs
@@ -813,7 +813,7 @@ accum :: Storable a
 accum = G.accum
 
 -- | /O(m+min(n1,n2))/ For each index @i@ from the index vector and the
--- corresponding value @b@ from the the value vector,
+-- corresponding value @b@ from the value vector,
 -- replace the element of the initial vector at
 -- position @i@ by @f a b@.
 --
diff --git a/vector/src/Data/Vector/Strict.hs b/vector/src/Data/Vector/Strict.hs
index 683c24f8..960049bb 100644
--- a/vector/src/Data/Vector/Strict.hs
+++ b/vector/src/Data/Vector/Strict.hs
@@ -1052,7 +1052,7 @@ accumulate :: (a -> b -> a)  -- ^ accumulating function @f@
 accumulate = G.accumulate
 
 -- | /O(m+min(n1,n2))/ For each index @i@ from the index vector and the
--- corresponding value @b@ from the the value vector,
+-- corresponding value @b@ from the value vector,
 -- replace the element of the initial vector at
 -- position @i@ by @f a b@.
 --
diff --git a/vector/src/Data/Vector/Unboxed.hs b/vector/src/Data/Vector/Unboxed.hs
index 0f5ed15c..d4e48036 100644
--- a/vector/src/Data/Vector/Unboxed.hs
+++ b/vector/src/Data/Vector/Unboxed.hs
@@ -808,7 +808,7 @@ accumulate :: (Unbox a, Unbox b)
 accumulate = G.accumulate
 
 -- | /O(m+min(n1,n2))/ For each index @i@ from the index vector and the
--- corresponding value @b@ from the the value vector,
+-- corresponding value @b@ from the value vector,
 -- replace the element of the initial vector at
 -- position @i@ by @f a b@.
 --