diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 7338b11280..8f317c25a7 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -1117,11 +1117,12 @@
         the exact assignment is looked for with right and left hand
         side matching.</para>
 
-        <para><varname>ConditionKernelVersion=</varname> may be used to check whether the kernel version (as reported
-        by <command>uname -r</command>) matches a certain expression (or if prefixed with the exclamation mark does not
-        match it). The argument must be a single string. If the string starts with one of <literal>&lt;</literal>,
-        <literal>&lt;=</literal>, <literal>=</literal>, <literal>&gt;=</literal>, <literal>&gt;</literal> a relative
-        version comparison is done, otherwise the specified string is matched with shell-style globs.</para>
+        <para><varname>ConditionKernelVersion=</varname> may be used to check whether the kernel version (as
+        reported by <command>uname -r</command>) matches a certain expression (or if prefixed with the
+        exclamation mark does not match it). The argument must be a single string. If the string starts with
+        one of <literal>&lt;</literal>, <literal>&lt;=</literal>, <literal>=</literal>,
+        <literal>!=</literal>, <literal>&gt;=</literal>, <literal>&gt;</literal> a relative version
+        comparison is done, otherwise the specified string is matched with shell-style globs.</para>
 
         <para>Note that using the kernel version string is an unreliable way to determine which features are supported
         by a kernel, because of the widespread practice of backporting drivers, features, and fixes from newer upstream
diff --git a/src/shared/condition.c b/src/shared/condition.c
index 5853b4d61f..38ebaef62b 100644
--- a/src/shared/condition.c
+++ b/src/shared/condition.c
@@ -138,6 +138,7 @@ typedef enum {
         ORDER_LOWER,
         ORDER_GREATER,
         ORDER_EQUAL,
+        ORDER_UNEQUAL,
         _ORDER_MAX,
         _ORDER_INVALID = -1
 } OrderOperator;
@@ -150,6 +151,7 @@ static OrderOperator parse_order(const char **s) {
                 [ORDER_LOWER] = "<",
                 [ORDER_GREATER] = ">",
                 [ORDER_EQUAL] = "=",
+                [ORDER_UNEQUAL] = "!=",
         };
 
         OrderOperator i;
@@ -180,6 +182,9 @@ static bool test_order(int k, OrderOperator p) {
         case ORDER_EQUAL:
                 return k == 0;
 
+        case ORDER_UNEQUAL:
+                return k != 0;
+
         case ORDER_GREATER_OR_EQUAL:
                 return k >= 0;