diff --git a/kotlin-native/runtime/build.gradle.kts b/kotlin-native/runtime/build.gradle.kts
index e4004f76af9..6675e72f410 100644
--- a/kotlin-native/runtime/build.gradle.kts
+++ b/kotlin-native/runtime/build.gradle.kts
@@ -546,7 +546,6 @@ konanArtifacts {
                 "-opt-in=kotlin.contracts.ExperimentalContracts",
                 "-opt-in=kotlin.ExperimentalMultiplatform",
                 "-opt-in=kotlin.native.internal.InternalForKotlinNative",
-                "-XXLanguage:+RangeUntilOperator",
         )
 
         commonStdlibSrcDirs.forEach { commonSrcDir(it) }
diff --git a/libraries/stdlib/common/build.gradle b/libraries/stdlib/common/build.gradle
index c395d6c7609..736233199e2 100644
--- a/libraries/stdlib/common/build.gradle
+++ b/libraries/stdlib/common/build.gradle
@@ -47,7 +47,6 @@ compileKotlinCommon {
                 "-opt-in=kotlin.ExperimentalMultiplatform",
                 "-opt-in=kotlin.contracts.ExperimentalContracts",
                 "-Xallow-kotlin-package",
-                "-XXLanguage:+RangeUntilOperator",
         ]
     }
 }
@@ -59,7 +58,6 @@ compileTestKotlinCommon {
                 "-opt-in=kotlin.ExperimentalUnsignedTypes",
                 "-opt-in=kotlin.ExperimentalStdlibApi",
                 "-opt-in=kotlin.io.encoding.ExperimentalEncodingApi",
-                "-XXLanguage:+RangeUntilOperator",
         ]
     }
 }
diff --git a/libraries/stdlib/js-ir-minimal-for-test/build.gradle.kts b/libraries/stdlib/js-ir-minimal-for-test/build.gradle.kts
index e0ed6e532b6..d8ca67428f2 100644
--- a/libraries/stdlib/js-ir-minimal-for-test/build.gradle.kts
+++ b/libraries/stdlib/js-ir-minimal-for-test/build.gradle.kts
@@ -143,7 +143,6 @@ tasks.withType<KotlinCompile<*>> {
         "-opt-in=kotlin.RequiresOptIn",
         "-opt-in=kotlin.ExperimentalUnsignedTypes",
         "-opt-in=kotlin.ExperimentalStdlibApi",
-        "-XXLanguage:+RangeUntilOperator",
     )
 }
 
diff --git a/libraries/stdlib/js-ir/build.gradle.kts b/libraries/stdlib/js-ir/build.gradle.kts
index 2b75ebe8791..aa66ed799aa 100644
--- a/libraries/stdlib/js-ir/build.gradle.kts
+++ b/libraries/stdlib/js-ir/build.gradle.kts
@@ -146,7 +146,6 @@ tasks.withType<KotlinCompile<*>>().configureEach {
         "-opt-in=kotlin.ExperimentalUnsignedTypes",
         "-opt-in=kotlin.ExperimentalStdlibApi",
         "-opt-in=kotlin.io.encoding.ExperimentalEncodingApi",
-        "-XXLanguage:+RangeUntilOperator",
     )
 }
 
diff --git a/libraries/stdlib/js-v1/build.gradle b/libraries/stdlib/js-v1/build.gradle
index d47a09a8213..33ce3c6db8e 100644
--- a/libraries/stdlib/js-v1/build.gradle
+++ b/libraries/stdlib/js-v1/build.gradle
@@ -134,7 +134,6 @@ compileKotlin2Js {
             "-opt-in=kotlin.RequiresOptIn",
             "-opt-in=kotlin.ExperimentalMultiplatform",
             "-opt-in=kotlin.contracts.ExperimentalContracts",
-            "-XXLanguage:+RangeUntilOperator",
             "-Xforce-deprecated-legacy-compiler-usage"
         ]
     }
@@ -148,7 +147,6 @@ compileTestKotlin2Js {
             "-opt-in=kotlin.ExperimentalUnsignedTypes",
             "-opt-in=kotlin.ExperimentalStdlibApi",
             "-opt-in=kotlin.io.encoding.ExperimentalEncodingApi",
-            "-XXLanguage:+RangeUntilOperator",
         ]
     }
 }
diff --git a/libraries/stdlib/jvm/build.gradle b/libraries/stdlib/jvm/build.gradle
index 6697b27c1cd..da6c74abad5 100644
--- a/libraries/stdlib/jvm/build.gradle
+++ b/libraries/stdlib/jvm/build.gradle
@@ -152,7 +152,6 @@ compileKotlin {
                 "-opt-in=kotlin.contracts.ExperimentalContracts",
                 "-Xuse-14-inline-classes-mangling-scheme",
                 "-Xbuiltins-from-sources",
-                "-XXLanguage:+RangeUntilOperator",
                 "-Xno-new-java-annotation-targets",
         ]
         moduleName = "kotlin-stdlib"
@@ -197,7 +196,6 @@ compileTestKotlin {
                 "-opt-in=kotlin.ExperimentalStdlibApi",
                 "-opt-in=kotlin.io.path.ExperimentalPathApi",
                 "-opt-in=kotlin.io.encoding.ExperimentalEncodingApi",
-                "-XXLanguage:+RangeUntilOperator",
                 "-Xallow-kotlin-package", // TODO: maybe rename test packages
         ]
         if (project.kotlinBuildProperties.useFir) {
diff --git a/libraries/stdlib/wasm/build.gradle.kts b/libraries/stdlib/wasm/build.gradle.kts
index 21d4f83a25f..846a30a3083 100644
--- a/libraries/stdlib/wasm/build.gradle.kts
+++ b/libraries/stdlib/wasm/build.gradle.kts
@@ -130,7 +130,6 @@ tasks.withType<KotlinCompile<*>>().configureEach {
         "-opt-in=kotlin.ExperimentalUnsignedTypes",
         "-opt-in=kotlin.ExperimentalStdlibApi",
         "-opt-in=kotlin.io.encoding.ExperimentalEncodingApi",
-        "-XXLanguage:+RangeUntilOperator",
     )
 }