diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/infrastructure/ApiAbstractions.kt.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/infrastructure/ApiAbstractions.kt.mustache
index 12c0350232fd..4b7d0599cb26 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-client/infrastructure/ApiAbstractions.kt.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-client/infrastructure/ApiAbstractions.kt.mustache
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 {{#nonPublicApi}}internal {{/nonPublicApi}}fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/client/petstore/kotlin-nonpublic/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/client/petstore/kotlin-nonpublic/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index ed07e5d75434..6f180df2254e 100644
--- a/samples/client/petstore/kotlin-nonpublic/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/client/petstore/kotlin-nonpublic/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 internal fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/client/petstore/kotlin-okhttp3/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/client/petstore/kotlin-okhttp3/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/client/petstore/kotlin-okhttp3/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/client/petstore/kotlin-okhttp3/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/openapi3/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/openapi3/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/openapi3/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/openapi3/client/petstore/kotlin-multiplatform/src/commonMain/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }
 
diff --git a/samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt b/samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
index 30d3705e5b49..ef7a8f1e1a62 100644
--- a/samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
+++ b/samples/openapi3/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiAbstractions.kt
@@ -5,8 +5,8 @@ typealias MultiValueMap = MutableMap<String,List<String>>
 fun collectionDelimiter(collectionFormat: String) = when(collectionFormat) {
     "csv" -> ","
     "tsv" -> "\t"
-    "pipes" -> "|"
-    "ssv" -> " "
+    "pipe" -> "|"
+    "space" -> " "
     else -> ""
 }