diff --git a/django/core/management.py b/django/core/management.py
index c85bbcbfe4..d6da2ab865 100644
--- a/django/core/management.py
+++ b/django/core/management.py
@@ -290,7 +290,7 @@ def get_sql_delete(app):
                     output.append('%s %s %s %s;' % \
                         (style.SQL_KEYWORD('ALTER TABLE'),
                         style.SQL_TABLE(backend.quote_name(table)),
-                        style.SQL_KEYWORD('DROP CONSTRAINT'),
+                        style.SQL_KEYWORD(backend.get_drop_foreignkey_sql()),
                         style.SQL_FIELD(backend.quote_name("%s_referencing_%s_%s" % (col, r_table, r_col)))))
                 del references_to_delete[klass]
 
diff --git a/django/db/backends/ado_mssql/base.py b/django/db/backends/ado_mssql/base.py
index 03216982a0..b43be1fa7a 100644
--- a/django/db/backends/ado_mssql/base.py
+++ b/django/db/backends/ado_mssql/base.py
@@ -121,6 +121,9 @@ def get_limit_offset_sql(limit, offset=None):
 def get_random_function_sql():
     return "RAND()"
 
+def get_drop_foreignkey_sql():
+    return "DROP CONSTRAINT"
+
 OPERATOR_MAPPING = {
     'exact': '= %s',
     'iexact': 'LIKE %s',
diff --git a/django/db/backends/dummy/base.py b/django/db/backends/dummy/base.py
index 07648033ed..89fec00c1d 100644
--- a/django/db/backends/dummy/base.py
+++ b/django/db/backends/dummy/base.py
@@ -33,4 +33,5 @@ get_date_extract_sql = complain
 get_date_trunc_sql = complain
 get_limit_offset_sql = complain
 get_random_function_sql = complain
+get_drop_foreignkey_sql = complain
 OPERATOR_MAPPING = {}
diff --git a/django/db/backends/mysql/base.py b/django/db/backends/mysql/base.py
index ac2e7c7b3e..f3282553e6 100644
--- a/django/db/backends/mysql/base.py
+++ b/django/db/backends/mysql/base.py
@@ -146,6 +146,9 @@ def get_limit_offset_sql(limit, offset=None):
 def get_random_function_sql():
     return "RAND()"
 
+def get_drop_foreignkey_sql():
+    return "DROP FOREIGN KEY"
+
 OPERATOR_MAPPING = {
     'exact': '= %s',
     'iexact': 'LIKE %s',
diff --git a/django/db/backends/postgresql/base.py b/django/db/backends/postgresql/base.py
index 20800f37bf..3c807f2120 100644
--- a/django/db/backends/postgresql/base.py
+++ b/django/db/backends/postgresql/base.py
@@ -98,6 +98,9 @@ def get_limit_offset_sql(limit, offset=None):
 def get_random_function_sql():
     return "RANDOM()"
 
+def get_drop_foreignkey_sql():
+    return "DROP CONSTRAINT"
+
 # Register these custom typecasts, because Django expects dates/times to be
 # in Python's native (standard-library) datetime/time format, whereas psycopg
 # use mx.DateTime by default.
diff --git a/django/db/backends/sqlite3/base.py b/django/db/backends/sqlite3/base.py
index efc775d0c3..ecaf9b0c0d 100644
--- a/django/db/backends/sqlite3/base.py
+++ b/django/db/backends/sqlite3/base.py
@@ -116,6 +116,9 @@ def get_limit_offset_sql(limit, offset=None):
 def get_random_function_sql():
     return "RANDOM()"
 
+def get_drop_foreignkey_sql():
+    return ""
+
 def _sqlite_date_trunc(lookup_type, dt):
     try:
         dt = util.typecast_timestamp(dt)