diff --git a/changelogs/fragments/openssl_certificate-generate-acme-missing-space.yaml b/changelogs/fragments/openssl_certificate-generate-acme-missing-space.yaml
new file mode 100644
index 00000000000..58d5a174b5b
--- /dev/null
+++ b/changelogs/fragments/openssl_certificate-generate-acme-missing-space.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - openssl-certificate - Add space between arguments for acme-tiny (https://github.com/ansible/ansible/pull/36739)
diff --git a/lib/ansible/modules/crypto/openssl_certificate.py b/lib/ansible/modules/crypto/openssl_certificate.py
index f2c75151843..453658a1e25 100644
--- a/lib/ansible/modules/crypto/openssl_certificate.py
+++ b/lib/ansible/modules/crypto/openssl_certificate.py
@@ -771,7 +771,7 @@ class AcmeCertificate(Certificate):
                 chain = '--chain'
 
             try:
-                crt = module.run_command("%s %s --account-key %s --csr %s"
+                crt = module.run_command("%s %s --account-key %s --csr %s "
                                          "--acme-dir %s" % (acme_tiny_path, chain,
                                                             self.accountkey_path,
                                                             self.csr_path,