diff --git a/aws/external/shared_config_test.go b/aws/external/shared_config_test.go
index b4ff87a13f1..cf4836d15db 100644
--- a/aws/external/shared_config_test.go
+++ b/aws/external/shared_config_test.go
@@ -287,6 +287,16 @@ func TestLoadSharedConfigFromFile(t *testing.T) {
 				Err:      nil,
 			},
 		},
+		{
+			Profile:   "with_mixed_case_keys",
+			Expected: SharedConfig{
+				Credentials: aws.Credentials{
+					AccessKeyID:     "accessKey",
+					SecretAccessKey: "secret",
+					Source:          fmt.Sprintf("SharedConfigCredentials: %s", testConfigFilename),
+				},
+			},
+		},
 	}
 
 	for i, c := range cases {
diff --git a/aws/external/testdata/shared_config b/aws/external/testdata/shared_config
index 9216ea4bcc6..bb322ccc809 100644
--- a/aws/external/testdata/shared_config
+++ b/aws/external/testdata/shared_config
@@ -74,3 +74,7 @@ s3_use_arn_region=true
 
 [endpoint_discovery]
 endpoint_discovery_enabled=true
+
+[with_mixed_case_keys]
+aWs_AcCeSs_kEy_ID: accessKey
+aWs_SecrEt_AccEsS_kEY: secret
diff --git a/internal/ini/testdata/valid/mixed_case_keys b/internal/ini/testdata/valid/mixed_case_keys
new file mode 100644
index 00000000000..83246f02590
--- /dev/null
+++ b/internal/ini/testdata/valid/mixed_case_keys
@@ -0,0 +1,4 @@
+[with_mixed_case_keys]
+sTring_Value = secret
+iNt_Value = 60
+flOAt_Value = 12.3
diff --git a/internal/ini/testdata/valid/mixed_case_keys_expected b/internal/ini/testdata/valid/mixed_case_keys_expected
new file mode 100644
index 00000000000..ec363ca7f4d
--- /dev/null
+++ b/internal/ini/testdata/valid/mixed_case_keys_expected
@@ -0,0 +1,7 @@
+{
+	"with_mixed_case_keys": {
+		"int_value": 60,
+		"string_value": "secret",
+		"float_value": 12.3
+	}
+}
diff --git a/internal/ini/testdata/valid/utf_8_profile_expected b/internal/ini/testdata/valid/utf_8_profile_expected
index 601027d38d1..3cc185b4f88 100644
--- a/internal/ini/testdata/valid/utf_8_profile_expected
+++ b/internal/ini/testdata/valid/utf_8_profile_expected
@@ -1,6 +1,6 @@
 {
 	"ʃʉʍΡιξ": {
-		"ϰϪϧ": "Ϯϴϖ",
+		"ϰϫϧ": "Ϯϴϖ",
 		"ϝϧ": "ϟΞ΅"
 	}
 }
diff --git a/internal/ini/visitor.go b/internal/ini/visitor.go
index 94841c32443..7ad98653638 100644
--- a/internal/ini/visitor.go
+++ b/internal/ini/visitor.go
@@ -3,6 +3,7 @@ package ini
 import (
 	"fmt"
 	"sort"
+	"strings"
 )
 
 // Visitor is an interface used by walkers that will
@@ -60,7 +61,7 @@ func (v *DefaultVisitor) VisitExpr(expr AST) error {
 				return err
 			}
 
-			t.values[key] = v
+			t.values[strings.ToLower(key)] = v
 		default:
 			return NewParseError(fmt.Sprintf("unsupported expression %v", expr))
 		}