diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index b8f5415a7ca..94e70e51a66 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -760,8 +760,8 @@
 @ stdcall RtlIpv4AddressToStringExA(ptr long ptr ptr)
 @ stdcall RtlIpv4AddressToStringExW(ptr long ptr ptr)
 @ stdcall RtlIpv4AddressToStringW(ptr ptr)
-# @ stub RtlIpv4StringToAddressA
-# @ stub RtlIpv4StringToAddressExA
+@ stdcall RtlIpv4StringToAddressA(str long ptr ptr)
+@ stdcall RtlIpv4StringToAddressExA(str long ptr ptr)
 @ stdcall RtlIpv4StringToAddressExW(wstr long ptr ptr)
 @ stdcall RtlIpv4StringToAddressW(wstr long ptr ptr)
 # @ stub RtlIpv6AddressToStringA
diff --git a/dlls/ntdll/rtl.c b/dlls/ntdll/rtl.c
index 72ecfd937ad..15ff037fef1 100644
--- a/dlls/ntdll/rtl.c
+++ b/dlls/ntdll/rtl.c
@@ -1039,6 +1039,41 @@ NTSTATUS WINAPI RtlIpv4StringToAddressW(const WCHAR *str, BOOLEAN strict, const
     return ipv4_string_to_address(str, strict, terminator, address, NULL);
 }
 
+/***********************************************************************
+ * RtlIpv4StringToAddressExA [NTDLL.@]
+ */
+NTSTATUS WINAPI RtlIpv4StringToAddressExA(const char *str, BOOLEAN strict, IN_ADDR *address, USHORT *port)
+{
+    WCHAR wstr[32];
+
+    TRACE("(%s, %u, %p, %p)\n", debugstr_a(str), strict, address, port);
+
+    if (!str || !address || !port)
+        return STATUS_INVALID_PARAMETER;
+
+    RtlMultiByteToUnicodeN(wstr, sizeof(wstr), NULL, str, strlen(str) + 1);
+    wstr[ARRAY_SIZE(wstr) - 1] = 0;
+    return ipv4_string_to_address(wstr, strict, NULL, address, port);
+}
+
+/***********************************************************************
+ * RtlIpv4StringToAddressA [NTDLL.@]
+ */
+NTSTATUS WINAPI RtlIpv4StringToAddressA(const char *str, BOOLEAN strict, const char **terminator, IN_ADDR *address)
+{
+    WCHAR wstr[32];
+    const WCHAR *wterminator;
+    NTSTATUS ret;
+
+    TRACE("(%s, %u, %p, %p)\n", debugstr_a(str), strict, terminator, address);
+
+    RtlMultiByteToUnicodeN(wstr, sizeof(wstr), NULL, str, strlen(str) + 1);
+    wstr[ARRAY_SIZE(wstr) - 1] = 0;
+    ret = ipv4_string_to_address(wstr, strict, &wterminator, address, NULL);
+    if (terminator) *terminator = str + (wterminator - wstr);
+    return ret;
+}
+
 /***********************************************************************
  * RtlIpv6StringToAddressExW [NTDLL.@]
  */
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 955bd00be7f..fca06884a06 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -1102,8 +1102,8 @@
 @ stdcall RtlIpv4AddressToStringExA(ptr long ptr ptr)
 @ stdcall RtlIpv4AddressToStringExW(ptr long ptr ptr)
 @ stdcall RtlIpv4AddressToStringW(ptr ptr)
-@ stub RtlIpv4StringToAddressA
-@ stub RtlIpv4StringToAddressExA
+@ stdcall RtlIpv4StringToAddressA(str long ptr ptr) ntdll.RtlIpv4StringToAddressA
+@ stdcall RtlIpv4StringToAddressExA(str long ptr ptr) ntdll.RtlIpv4StringToAddressExA
 @ stdcall RtlIpv4StringToAddressExW(wstr long ptr ptr)
 @ stdcall RtlIpv4StringToAddressW(wstr long ptr ptr)
 @ stub RtlIpv6AddressToStringA