diff --git a/manila/db/sqlalchemy/api.py b/manila/db/sqlalchemy/api.py
index 3a5e8d1653..c7abb52c31 100644
--- a/manila/db/sqlalchemy/api.py
+++ b/manila/db/sqlalchemy/api.py
@@ -1057,7 +1057,7 @@ def _quota_reserve(context, resources, project_quotas, user_or_st_quotas,
                 project_usages[key] = value
         overs = [res for res, delta in deltas.items()
                  if user_or_st_quotas[res] >= 0 and delta >= 0 and
-                 (project_quotas[res] < delta +
+                 (0 <= project_quotas[res] < delta +
                   project_usages[res]['total'] or
                   user_or_st_quotas[res] < delta +
                   user_or_st_usages[res].total)]
diff --git a/releasenotes/notes/bug-1872872-fix-quota-checking-b06fd372be143101.yaml b/releasenotes/notes/bug-1872872-fix-quota-checking-b06fd372be143101.yaml
new file mode 100644
index 0000000000..b00ac3ba03
--- /dev/null
+++ b/releasenotes/notes/bug-1872872-fix-quota-checking-b06fd372be143101.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+ -  |
+    Fixed quota issue that made it impossible to create resources when the project had the quotas
+    set to unlimited, and the user had a limited amount of quotas to use. Now, operations in the
+    mentioned quota scenario are working properly. Please see `Launchpad bug 1872872
+    <https://bugs.launchpad.net/manila/+bug/1872872>`_ for more details.