diff --git a/Eigen/src/Core/MathFunctionsImpl.h b/Eigen/src/Core/MathFunctionsImpl.h
index cf8dcc3b8..c4b5da3cc 100644
--- a/Eigen/src/Core/MathFunctionsImpl.h
+++ b/Eigen/src/Core/MathFunctionsImpl.h
@@ -28,7 +28,7 @@ namespace internal {
    2. If a is zero, approx_a_recip must be infinite with the same sign as a.
    3. If a is infinite, approx_a_recip must be zero with the same sign as a.
 
-   If the preconditions are satisfied, which they are for for the _*_rcp_ps
+   If the preconditions are satisfied, which they are for the _*_rcp_ps
    instructions on x86, the result has a maximum relative error of 2 ulps,
    and correctly handles reciprocals of zero, infinity, and NaN.
 */
@@ -66,7 +66,7 @@ struct generic_reciprocal_newton_step<Packet, 0> {
    2. If a is zero, approx_a_recip must be infinite with the same sign as a.
    3. If a is infinite, approx_a_recip must be zero with the same sign as a.
 
-   If the preconditions are satisfied, which they are for for the _*_rcp_ps
+   If the preconditions are satisfied, which they are for the _*_rcp_ps
    instructions on x86, the result has a maximum relative error of 2 ulps,
    and correctly handles zero, infinity, and NaN. Positive denormals are
    treated as zero.
@@ -116,7 +116,7 @@ struct generic_rsqrt_newton_step<Packet, 0> {
    2. If a is zero, approx_rsqrt must be infinite.
    3. If a is infinite, approx_rsqrt must be zero.
 
-   If the preconditions are satisfied, which they are for for the _*_rsqrt_ps
+   If the preconditions are satisfied, which they are for the _*_rsqrt_ps
    instructions on x86, the result has a maximum relative error of 2 ulps,
    and correctly handles zero and infinity, and NaN. Positive denormal inputs
    are treated as zero.
diff --git a/doc/QuickReference.dox b/doc/QuickReference.dox
index c61d47afa..1fb000fdc 100644
--- a/doc/QuickReference.dox
+++ b/doc/QuickReference.dox
@@ -449,7 +449,7 @@ conj(array1)
 </td></tr>
 </table>
 
-Some coefficient-wise operators are readily available for for matrices and vectors through the following cwise* methods:
+Some coefficient-wise operators are readily available for matrices and vectors through the following cwise* methods:
 <table class="manual">
 <tr><th>Matrix API \matrixworld</th><th>Via Array conversions</th></tr>
 <tr><td>\code