diff --git a/AK/DeprecatedString.cpp b/AK/DeprecatedString.cpp
index f30fbae61f4..c2ff851ea66 100644
--- a/AK/DeprecatedString.cpp
+++ b/AK/DeprecatedString.cpp
@@ -172,7 +172,8 @@ Optional<T> DeprecatedString::to_int(TrimWhitespace trim_whitespace) const
 template Optional<i8> DeprecatedString::to_int(TrimWhitespace) const;
 template Optional<i16> DeprecatedString::to_int(TrimWhitespace) const;
 template Optional<i32> DeprecatedString::to_int(TrimWhitespace) const;
-template Optional<i64> DeprecatedString::to_int(TrimWhitespace) const;
+template Optional<long> DeprecatedString::to_int(TrimWhitespace) const;
+template Optional<long long> DeprecatedString::to_int(TrimWhitespace) const;
 
 template<typename T>
 Optional<T> DeprecatedString::to_uint(TrimWhitespace trim_whitespace) const
diff --git a/AK/StringUtils.cpp b/AK/StringUtils.cpp
index 58157d148e6..eba74f8ee09 100644
--- a/AK/StringUtils.cpp
+++ b/AK/StringUtils.cpp
@@ -157,8 +157,6 @@ template Optional<u16> convert_to_uint(StringView str, TrimWhitespace);
 template Optional<u32> convert_to_uint(StringView str, TrimWhitespace);
 template Optional<unsigned long> convert_to_uint(StringView str, TrimWhitespace);
 template Optional<unsigned long long> convert_to_uint(StringView str, TrimWhitespace);
-template Optional<long> convert_to_uint(StringView str, TrimWhitespace);
-template Optional<long long> convert_to_uint(StringView str, TrimWhitespace);
 
 template<typename T>
 Optional<T> convert_to_uint_from_hex(StringView str, TrimWhitespace trim_whitespace)
diff --git a/AK/StringView.cpp b/AK/StringView.cpp
index f299ab707bf..92315f6add9 100644
--- a/AK/StringView.cpp
+++ b/AK/StringView.cpp
@@ -239,8 +239,6 @@ template Optional<u16> StringView::to_uint() const;
 template Optional<u32> StringView::to_uint() const;
 template Optional<unsigned long> StringView::to_uint() const;
 template Optional<unsigned long long> StringView::to_uint() const;
-template Optional<long> StringView::to_uint() const;
-template Optional<long long> StringView::to_uint() const;
 
 #ifndef KERNEL
 Optional<double> StringView::to_double(TrimWhitespace trim_whitespace) const