diff --git a/icu4c/source/tools/escapesrc/escapesrc.cpp b/icu4c/source/tools/escapesrc/escapesrc.cpp
index 6f97be4e9a4..ab240383e89 100644
--- a/icu4c/source/tools/escapesrc/escapesrc.cpp
+++ b/icu4c/source/tools/escapesrc/escapesrc.cpp
@@ -251,6 +251,9 @@ bool fixAt(std::string &linestr, size_t pos) {
       int32_t trail = U8_COUNT_TRAIL_BYTES(linestr[pos]);
       for(size_t pos2 = pos+1; trail>0; pos2++,trail--) {
         linestr[pos2] = cp1047_to_8859(linestr[pos2]);
+        if(linestr[pos2] == 0x0A) {
+          linestr[pos2] = 0x85; // NL is ambiguous here
+        }
       }
 #endif
       
diff --git a/icu4c/source/tools/escapesrc/expect-simple.cpp b/icu4c/source/tools/escapesrc/expect-simple.cpp
index 3770bfba7ec..a6019a8d403 100644
--- a/icu4c/source/tools/escapesrc/expect-simple.cpp
+++ b/icu4c/source/tools/escapesrc/expect-simple.cpp
@@ -4,6 +4,7 @@
 u"sa\u0127\u0127a";
 u'\u6587';
 u"\U000219F2";
+u"\u039C\u03C5\u03C3\u03C4\u03AE\u03C1\u03B9\u03BF";
 
  u"sa\u0127\u0127a";
  u'\u6587'; u"\U000219F2";
diff --git a/icu4c/source/tools/escapesrc/test-simple.cpp b/icu4c/source/tools/escapesrc/test-simple.cpp
index b2fc953e475..b03f28f7067 100644
--- a/icu4c/source/tools/escapesrc/test-simple.cpp
+++ b/icu4c/source/tools/escapesrc/test-simple.cpp
@@ -4,6 +4,7 @@
 u"saħħa";
 u'文';
 u"𡧲";
+u"Μυστήριο";
 
  u"saħħa";
  u'文'; u"𡧲";