diff --git a/src/backend/utils/adt/like_match.c b/src/backend/utils/adt/like_match.c
index f5f72b82e21..ddaf6b1806a 100644
--- a/src/backend/utils/adt/like_match.c
+++ b/src/backend/utils/adt/like_match.c
@@ -257,9 +257,8 @@ MatchText(const char *t, int tlen, const char *p, int plen, pg_locale_t locale)
 				for (const char *c = p; c < p1; c++)
 				{
 					if (*c == '\\')
-						;
-					else
-						*(b++) = *c;
+						c++;	/* we already checked this isn't the end */
+					*(b++) = *c;
 				}
 
 				subpat = buf;
diff --git a/src/test/regress/expected/collate.icu.utf8.out b/src/test/regress/expected/collate.icu.utf8.out
index fb95eee9b7c..3209964cc44 100644
--- a/src/test/regress/expected/collate.icu.utf8.out
+++ b/src/test/regress/expected/collate.icu.utf8.out
@@ -3006,6 +3006,37 @@ SELECT U&'\0061\0308bc' LIKE U&'_\00e4bc' COLLATE ignore_accents;
 -- escape character at end of pattern
 SELECT 'foox' LIKE 'foo\' COLLATE ignore_accents;
 ERROR:  LIKE pattern must not end with escape character
+-- literal backslash with nondeterministic collation (bug #19474)
+SELECT 'back\slash' COLLATE ignore_accents LIKE 'back\slash%' ESCAPE '#';
+ ?column? 
+----------
+ t
+(1 row)
+
+SELECT 'aäb' COLLATE ignore_accents LIKE 'a#äb' ESCAPE '#' AS multibyte_escape;
+ multibyte_escape 
+------------------
+ t
+(1 row)
+
+SELECT 'a\äb' COLLATE ignore_accents LIKE 'a\äb%' ESCAPE '#' AS backslash_multibyte;
+ backslash_multibyte 
+---------------------
+ t
+(1 row)
+
+SELECT 'a\b%c' COLLATE ignore_accents LIKE 'a#\b#%%c' ESCAPE '#' AS mixed_escapes;
+ mixed_escapes 
+---------------
+ t
+(1 row)
+
+SELECT 'backslash' COLLATE ignore_accents LIKE 'back\\slash%';
+ ?column? 
+----------
+ f
+(1 row)
+
 -- foreign keys (mixing different nondeterministic collations not allowed)
 CREATE TABLE test10pk (x text COLLATE case_sensitive PRIMARY KEY);
 CREATE TABLE test10fk (x text COLLATE case_insensitive REFERENCES test10pk (x) ON UPDATE CASCADE ON DELETE CASCADE);  -- error
diff --git a/src/test/regress/sql/collate.icu.utf8.sql b/src/test/regress/sql/collate.icu.utf8.sql
index 954d8ea6cb4..3cee7223f95 100644
--- a/src/test/regress/sql/collate.icu.utf8.sql
+++ b/src/test/regress/sql/collate.icu.utf8.sql
@@ -1083,6 +1083,13 @@ SELECT U&'\0061\0308bc' LIKE U&'_\00e4bc' COLLATE ignore_accents;
 -- escape character at end of pattern
 SELECT 'foox' LIKE 'foo\' COLLATE ignore_accents;
 
+-- literal backslash with nondeterministic collation (bug #19474)
+SELECT 'back\slash' COLLATE ignore_accents LIKE 'back\slash%' ESCAPE '#';
+SELECT 'aäb' COLLATE ignore_accents LIKE 'a#äb' ESCAPE '#' AS multibyte_escape;
+SELECT 'a\äb' COLLATE ignore_accents LIKE 'a\äb%' ESCAPE '#' AS backslash_multibyte;
+SELECT 'a\b%c' COLLATE ignore_accents LIKE 'a#\b#%%c' ESCAPE '#' AS mixed_escapes;
+SELECT 'backslash' COLLATE ignore_accents LIKE 'back\\slash%';
+
 -- foreign keys (mixing different nondeterministic collations not allowed)
 CREATE TABLE test10pk (x text COLLATE case_sensitive PRIMARY KEY);
 CREATE TABLE test10fk (x text COLLATE case_insensitive REFERENCES test10pk (x) ON UPDATE CASCADE ON DELETE CASCADE);  -- error