diff --git a/src/matmul.jl b/src/matmul.jl
index d618bcfe..f459bc1f 100644
--- a/src/matmul.jl
+++ b/src/matmul.jl
@@ -1063,17 +1063,15 @@ function __generic_matvecmul!(::typeof(identity), C::AbstractVector, A::Abstract
                             alpha::Number, beta::Number)
     Astride = size(A, 1)
     @inbounds begin
-        for i = eachindex(C)
-            if !iszero(beta)
-                C[i] *= beta
-            elseif length(B) == 0
+        for i in eachindex(C)
+            if length(B) == 0
                 C[i] = zero(eltype(C))
             else
-                C[i] = zero(A[i]*B[1] + A[i]*B[1])
+                C[i] = A[i]*B[1]*alpha + C[i]*beta
             end
         end
         if !iszero(alpha)
-            for k = eachindex(B)
+            for k in @view eachindex(B)[2:end]
                 aoffs = (k-1)*Astride
                 b = @stable_muladdmul MulAddMul(alpha,false)(B[k])
                 for i = eachindex(C)