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-rw-r--r--core/gas.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/gas.c b/core/gas.c
index 040f938f6..757f912b0 100644
--- a/core/gas.c
+++ b/core/gas.c
@@ -16,7 +16,7 @@ bool isobaric_counterdiffusion(struct gasmix oldgasmix, struct gasmix newgasmix,
{
if (!prefs.show_icd)
return false;
- results->dN2 = get_he(oldgasmix) + get_o2(oldgasmix) - get_he(newgasmix) - get_o2(newgasmix);
+ results->dN2 = get_n2(newgasmix) - get_n2(oldgasmix);
results->dHe = get_he(newgasmix) - get_he(oldgasmix);
return get_he(oldgasmix) > 0 && results->dN2 > 0 && results->dHe < 0 && get_he(oldgasmix) && results->dN2 > 0 && 5 * results->dN2 > -results->dHe;
}