diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index e6441cad5..32b399b38 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -10,6 +10,11 @@ Release Notes
 Upcoming Release
 ================
 
+
+* Include all countries in ammonia production resource. This is so that the full
+  EU28 ammonia demand can be correctly subtracted in the rule
+  :mod:`build_industry_sector_ratios`.
+
 * Regions are assigned to all buses with unique coordinates in the network with
   a preference given to substations. Previously, only substations had assigned
   regions, but this could lead to issues when a high spatial resolution was
diff --git a/rules/build_sector.smk b/rules/build_sector.smk
index d99c39aea..c8192d787 100644
--- a/rules/build_sector.smk
+++ b/rules/build_sector.smk
@@ -392,8 +392,6 @@ rule build_salt_cavern_potentials:
 
 
 rule build_ammonia_production:
-    params:
-        countries=config["countries"],
     input:
         usgs="data/bundle-sector/myb1-2017-nitro.xls",
     output:
diff --git a/scripts/build_ammonia_production.py b/scripts/build_ammonia_production.py
index 1bcdf9ae5..e2cf6a7bc 100644
--- a/scripts/build_ammonia_production.py
+++ b/scripts/build_ammonia_production.py
@@ -25,13 +25,14 @@
         header=0,
         index_col=0,
         skipfooter=19,
+        na_values=["--"],
     )
 
     ammonia.index = cc.convert(ammonia.index, to="iso2")
 
     years = [str(i) for i in range(2013, 2018)]
-    countries = ammonia.index.intersection(snakemake.params.countries)
-    ammonia = ammonia.loc[countries, years].astype(float)
+
+    ammonia = ammonia[years]
 
     # convert from ktonN to ktonNH3
     ammonia *= 17 / 14