diff --git a/languagetool-language-modules/en/src/main/java/org/languagetool/rules/en/AvsAnRule.java b/languagetool-language-modules/en/src/main/java/org/languagetool/rules/en/AvsAnRule.java
index 37d5416d46c1..644e7d2ddada 100644
--- a/languagetool-language-modules/en/src/main/java/org/languagetool/rules/en/AvsAnRule.java
+++ b/languagetool-language-modules/en/src/main/java/org/languagetool/rules/en/AvsAnRule.java
@@ -95,6 +95,18 @@ public RuleMatch[] match(AnalyzedSentence sentence) {
       }
       if (equalsA || equalsAn) {
         Determiner determiner = getCorrectDeterminerFor(token);
+        // if token is "EUR", look at the following word to establish the correct determiner, e.g. "an EUR 80 million debt"
+        if (token.getToken().equals("EUR") && i < tokens.length - 1) {
+          if (tokens[i + 1].hasPosTag("PCT")) {
+            determiner = Determiner.A;
+          }
+          else {
+            determiner = getCorrectDeterminerFor(tokens[i + 1]);
+          }
+        // if token is "EUR" and no other word follows it (sentence-final), use "a"
+        } else if (token.getToken().equals("EUR") && i == tokens.length - 1) {
+          determiner = Determiner.A;
+        }
         String msg = null;
         if (equalsA && determiner == Determiner.AN) {
           String replacement = StringTools.startsWithUppercase(prevTokenStr) ? "An" : "an";
diff --git a/languagetool-language-modules/en/src/main/resources/org/languagetool/rules/en/det_a.txt b/languagetool-language-modules/en/src/main/resources/org/languagetool/rules/en/det_a.txt
index 09ae28c4db5b..8851af6672ff 100644
--- a/languagetool-language-modules/en/src/main/resources/org/languagetool/rules/en/det_a.txt
+++ b/languagetool-language-modules/en/src/main/resources/org/languagetool/rules/en/det_a.txt
@@ -3,6 +3,7 @@
 # line starts with '*').
 # Add words that allow both 'a' and 'an' to det_a.txt and det_an.txt.
 # Also see: http://www.learnenglish.org.uk/grammar/archive/articles_pronunciation.html
+100
 Eucharistic
 eukaryote
 eukaryotic
diff --git a/languagetool-language-modules/en/src/test/java/org/languagetool/rules/en/AvsAnRuleTest.java b/languagetool-language-modules/en/src/test/java/org/languagetool/rules/en/AvsAnRuleTest.java
index 411e1349bebc..5164f26e7e7c 100644
--- a/languagetool-language-modules/en/src/test/java/org/languagetool/rules/en/AvsAnRuleTest.java
+++ b/languagetool-language-modules/en/src/test/java/org/languagetool/rules/en/AvsAnRuleTest.java
@@ -44,6 +44,10 @@ public void setUp() throws IOException {
   public void testRule() throws IOException {
 
     // correct sentences:
+    assertCorrect("The company has also entered into a EUR 100 million ($88 million) debt");
+    assertCorrect("The company has also entered into an EUR 80 million debt");
+    assertCorrect("It costs a EUR");
+    assertCorrect("It costs a EUR.");
     assertCorrect("Import an Xcode project.");
     assertCorrect("This is a oncer.");
     assertCorrect("She was a Oaxacan chef.");
@@ -73,6 +77,10 @@ public void testRule() throws IOException {
     assertCorrect("He also wrote the comic strips Abbie an' Slats.");
 
     // errors:
+    assertIncorrect("The company has also entered into an EUR 100 million ($88 million) debt");
+    assertIncorrect("The company has also entered into a EUR 80 million debt");
+    assertIncorrect("It costs an EUR");
+    assertIncorrect("It costs an EUR.");
     assertIncorrect("It was a hour ago.");
     assertIncorrect("It was an sentence that's long.");
     assertIncorrect("It was a uninteresting talk.");