diff --git a/src/command/help/help.c b/src/command/help/help.c
index e1b5df4a8..4407da51a 100644
--- a/src/command/help/help.c
+++ b/src/command/help/help.c
@@ -3,6 +3,7 @@ Help Command
 ***********************************************************************************************************************************/
 #include "build.auto.h"
 
+#include <ctype.h>
 #include <string.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -359,9 +360,13 @@ helpRender(void)
                     {
                         ConfigOption optionId = varUInt(varLstGet(optionList, optionIdx));
 
-                        // Get option summary
-                        String *summary = strFirstLower(
-                            strNewN(strZ(optionData[optionId].summary), strSize(optionData[optionId].summary) - 1));
+                        // Get option summary and lower-case first letter if it does not appear to be part of an acronym
+                        String *summary = strNewN(strZ(optionData[optionId].summary), strSize(optionData[optionId].summary) - 1);
+                        ASSERT(strSize(summary) > 1);
+                        ASSERT(!isupper(strZ(summary)[1]));
+
+                        if (!isdigit(strZ(summary)[1]))
+                            strFirstLower(summary);
 
                         // Ouput current and default values if they exist
                         const String *defaultValue = helpRenderValue(cfgOptionDefault(optionId), cfgParseOptionType(optionId));
diff --git a/test/src/module/command/helpTest.c b/test/src/module/command/helpTest.c
index 9f209120a..0c9511c1b 100644
--- a/test/src/module/command/helpTest.c
+++ b/test/src/module/command/helpTest.c
@@ -220,19 +220,19 @@ testRun(void)
             "                                   [default=pgbackrest]\n"
             "  --repo-path                      path where backups and archive are stored\n"
             "                                   [default=/var/lib/pgbackrest]\n"
-            "  --repo-s3-bucket                 s3 repository bucket\n"
-            "  --repo-s3-ca-file                s3 SSL CA File\n"
-            "  --repo-s3-ca-path                s3 SSL CA Path\n"
-            "  --repo-s3-endpoint               s3 repository endpoint\n"
-            "  --repo-s3-host                   s3 repository host\n"
-            "  --repo-s3-key                    s3 repository access key\n"
-            "  --repo-s3-key-secret             s3 repository secret access key\n"
-            "  --repo-s3-key-type               s3 repository key type [default=shared]\n"
-            "  --repo-s3-port                   s3 repository port [default=443]\n"
-            "  --repo-s3-region                 s3 repository region\n"
-            "  --repo-s3-role                   s3 repository role\n"
-            "  --repo-s3-token                  s3 repository security token\n"
-            "  --repo-s3-uri-style              s3 URI Style [default=host]\n"
+            "  --repo-s3-bucket                 S3 repository bucket\n"
+            "  --repo-s3-ca-file                S3 SSL CA File\n"
+            "  --repo-s3-ca-path                S3 SSL CA Path\n"
+            "  --repo-s3-endpoint               S3 repository endpoint\n"
+            "  --repo-s3-host                   S3 repository host\n"
+            "  --repo-s3-key                    S3 repository access key\n"
+            "  --repo-s3-key-secret             S3 repository secret access key\n"
+            "  --repo-s3-key-type               S3 repository key type [default=shared]\n"
+            "  --repo-s3-port                   S3 repository port [default=443]\n"
+            "  --repo-s3-region                 S3 repository region\n"
+            "  --repo-s3-role                   S3 repository role\n"
+            "  --repo-s3-token                  S3 repository security token\n"
+            "  --repo-s3-uri-style              S3 URI Style [default=host]\n"
             "  --repo-s3-verify-tls             verify S3 server certificate [default=y]\n"
             "  --repo-type                      type of storage used for the repository\n"
             "                                   [default=posix]\n"