diff --git a/src/flextopo.jl b/src/flextopo.jl
index aec1bb9af..466213d04 100644
--- a/src/flextopo.jl
+++ b/src/flextopo.jl
@@ -45,8 +45,8 @@
     g_tt::Vector{T} | "ᵒC"
     # Degree-day factor [mm ᵒC⁻¹ Δt⁻¹] for glacier
     g_cfmax::Vector{T} | "mm ᵒC-1 Δt-1"
-    # Fraction of the snowpack on top of the glacier converted into ice [-]
-    g_sifrac::Vector{T} | "-"
+    # Fraction of the snowpack on top of the glacier converted into ice [Δt⁻¹]
+    g_sifrac::Vector{T} | "Δt-1"
     # Water within the glacier [mm]
     glacierstore::Vector{T} | "mm"
     # Fraction covered by a glacier [-]
diff --git a/src/hbv.jl b/src/hbv.jl
index b1b1443ed..b5b376d62 100644
--- a/src/hbv.jl
+++ b/src/hbv.jl
@@ -29,7 +29,7 @@
     whc::Vector{T} | "-"                # Fraction of snow volume that can store water [-]
     g_tt::Vector{T} | "ᵒC"              # Threshold temperature for snowfall above glacier [ᵒC]
     g_cfmax::Vector{T} | "mm ᵒC-1 Δt-1" # Degree-day factor [mm ᵒC⁻¹ Δt⁻¹] for glacier
-    g_sifrac::Vector{T} | "-"           # Fraction of the snowpack on top of the glacier converted into ice [-]
+    g_sifrac::Vector{T} | "Δt-1"        # Fraction of the snowpack on top of the glacier converted into ice [Δt⁻¹]
     glacierstore::Vector{T} | "mm"      # Water within the glacier [mm]
     glacierfrac::Vector{T} | "-"        # Fraction covered by a glacier [-]
     precipitation::Vector{T}            # Precipitation [mm Δt⁻¹]
diff --git a/src/sbm.jl b/src/sbm.jl
index 03b0d3e9a..57a941e73 100644
--- a/src/sbm.jl
+++ b/src/sbm.jl
@@ -173,8 +173,8 @@
     g_tt::Vector{T} | "ᵒC"
     # Degree-day factor [mm ᵒC⁻¹ Δt⁻¹] for glacier
     g_cfmax::Vector{T} | "mm ᵒC-1 Δt-1"
-    # Fraction of the snowpack on top of the glacier converted into ice [-]
-    g_sifrac::Vector{T} | "-"
+    # Fraction of the snowpack on top of the glacier converted into ice [Δt⁻¹]
+    g_sifrac::Vector{T} | "Δt-1"
     # Water within the glacier [mm]
     glacierstore::Vector{T} | "mm"
     # Fraction covered by a glacier [-]