diff --git a/config/interpolate_funcs.go b/config/interpolate_funcs.go
index 4778f1ec6a21..abaa9817c132 100644
--- a/config/interpolate_funcs.go
+++ b/config/interpolate_funcs.go
@@ -20,18 +20,18 @@ var Funcs map[string]ast.Function
 
 func init() {
 	Funcs = map[string]ast.Function{
-		"concat":     interpolationFuncConcat(),
-		"element":    interpolationFuncElement(),
-		"file":       interpolationFuncFile(),
-		"format":     interpolationFuncFormat(),
-		"formatlist": interpolationFuncFormatList(),
-		"index":      interpolationFuncIndex(),
-		"join":       interpolationFuncJoin(),
-		"length":     interpolationFuncLength(),
-		"replace":    interpolationFuncReplace(),
-		"split":      interpolationFuncSplit(),
-		"base64enc":  interpolationFuncBase64Encode(),
-		"base64dec":  interpolationFuncBase64Decode(),
+		"concat":       interpolationFuncConcat(),
+		"element":      interpolationFuncElement(),
+		"file":         interpolationFuncFile(),
+		"format":       interpolationFuncFormat(),
+		"formatlist":   interpolationFuncFormatList(),
+		"index":        interpolationFuncIndex(),
+		"join":         interpolationFuncJoin(),
+		"length":       interpolationFuncLength(),
+		"replace":      interpolationFuncReplace(),
+		"split":        interpolationFuncSplit(),
+		"base64encode": interpolationFuncBase64Encode(),
+		"base64decode": interpolationFuncBase64Decode(),
 	}
 }
 
@@ -396,8 +396,8 @@ func interpolationFuncValues(vs map[string]ast.Variable) ast.Function {
 	}
 }
 
-// interpolationFuncBase64Encode implements the "base64enc" function that allows
-// Base64 encoding.
+// interpolationFuncBase64Encode implements the "base64encode" function that
+// allows Base64 encoding.
 func interpolationFuncBase64Encode() ast.Function {
 	return ast.Function{
 		ArgTypes:   []ast.Type{ast.TypeString},
@@ -409,8 +409,8 @@ func interpolationFuncBase64Encode() ast.Function {
 	}
 }
 
-// interpolationFuncBase64Decode implements the "base64dec" function that allows
-// Base64 decoding.
+// interpolationFuncBase64Decode implements the "base64decode" function that
+// allows Base64 decoding.
 func interpolationFuncBase64Decode() ast.Function {
 	return ast.Function{
 		ArgTypes:   []ast.Type{ast.TypeString},
diff --git a/config/interpolate_funcs_test.go b/config/interpolate_funcs_test.go
index 773f92c99c46..e4d275e5809d 100644
--- a/config/interpolate_funcs_test.go
+++ b/config/interpolate_funcs_test.go
@@ -589,7 +589,7 @@ func TestInterpolateFuncBase64Encode(t *testing.T) {
 		Cases: []testFunctionCase{
 			// Regular base64 encoding
 			{
-				`${base64enc("abc123!?$*&()'-=@~")}`,
+				`${base64encode("abc123!?$*&()'-=@~")}`,
 				"YWJjMTIzIT8kKiYoKSctPUB+",
 				false,
 			},
@@ -602,14 +602,14 @@ func TestInterpolateFuncBase64Decode(t *testing.T) {
 		Cases: []testFunctionCase{
 			// Regular base64 decoding
 			{
-				`${base64dec("YWJjMTIzIT8kKiYoKSctPUB+")}`,
+				`${base64decode("YWJjMTIzIT8kKiYoKSctPUB+")}`,
 				"abc123!?$*&()'-=@~",
 				false,
 			},
 
 			// Invalid base64 data decoding
 			{
-				`${base64dec("this-is-an-invalid-base64-data")}`,
+				`${base64decode("this-is-an-invalid-base64-data")}`,
 				nil,
 				true,
 			},
diff --git a/website/source/docs/configuration/interpolation.html.md b/website/source/docs/configuration/interpolation.html.md
index ff47202d8bbd..2e8eec5b693e 100644
--- a/website/source/docs/configuration/interpolation.html.md
+++ b/website/source/docs/configuration/interpolation.html.md
@@ -74,10 +74,10 @@ are documented below.
 
 The supported built-in functions are:
 
-  * `base64dec(string)` - Given a base64-encoded string, decodes it and
+  * `base64decode(string)` - Given a base64-encoded string, decodes it and
     returns the original string.
 
-  * `base64enc(string)` - Returns a base64-encoded representation of the
+  * `base64encode(string)` - Returns a base64-encoded representation of the
     given string.
 
   * `concat(list1, list2)` - Combines two or more lists into a single list.