diff --git a/src/P3Scheme.jl b/src/P3Scheme.jl
index 15b1eb5c0..da3605413 100644
--- a/src/P3Scheme.jl
+++ b/src/P3Scheme.jl
@@ -269,19 +269,18 @@ end
 # q_rim = 0 and D_min = D_th, D_max = inf
 function q_rz(p3::PSP3, N_0::FT, λ::FT, D_min::FT) where {FT}
     x = DSD_μ(p3, λ) + p3.β_va + 1
-    return p3.α_va * N_0 / λ^x * (Γ(x) + Γ(x, λ * D_min) - (x - 1) * Γ(x - 1))
+    return α_va_si(p3) * N_0 / λ^x * (Γ(x, λ * D_min))
 end
 # q_rim > 0 and D_min = D_th and D_max = D_gr
 function q_n(p3::PSP3, N_0::FT, λ::FT, D_min::FT, D_max::FT) where {FT}
     x = DSD_μ(p3, λ) + p3.β_va + 1
-    return p3.α_va * N_0 / λ^x * (Γ(x, λ * D_min) - Γ(x, λ * D_max))
+    return α_va_si(p3) * N_0 / λ^x * (Γ(x, λ * D_min) - Γ(x, λ * D_max))
 end
 # partially rimed ice or large unrimed ice (upper bound on D is infinity)
 # q_rim > 0 and D_min = D_cr, D_max = inf
 function q_r(p3::PSP3, F_r::FT, N_0::FT, λ::FT, D_min::FT) where {FT}
     x = DSD_μ(p3, λ) + p3.β_va + 1
-    return p3.α_va * N_0 / (1 - F_r) / λ^x *
-           (Γ(x) + Γ(x, λ * D_min) - (x - 1) * Γ(x - 1))
+    return α_va_si(p3) * N_0 / (1 - F_r) / λ^x * (Γ(x, λ * D_min))
 end
 
 """