diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 43ac906c6e..00f6b40687 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -332,6 +332,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
 
               "qxl.max_outputs", /* 225 */
               "qxl-vga.max_outputs",
+              "spice-unix",
     );
 
 
@@ -2664,6 +2665,7 @@ static struct virQEMUCapsCommandLineProps virQEMUCapsCommandLine[] = {
     { "chardev", "logfile", QEMU_CAPS_CHARDEV_LOGFILE },
     { "name", "debug-threads", QEMU_CAPS_NAME_DEBUG_THREADS },
     { "name", "guest", QEMU_CAPS_NAME_GUEST },
+    { "spice", "unix", QEMU_CAPS_SPICE_UNIX },
 };
 
 static int
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 77e4b9873b..e273f2a440 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -364,6 +364,7 @@ typedef enum {
     /* 225 */
     QEMU_CAPS_QXL_MAX_OUTPUTS, /* -device qxl,max-outputs= */
     QEMU_CAPS_QXL_VGA_MAX_OUTPUTS, /* -device qxl-vga,max-outputs= */
+    QEMU_CAPS_SPICE_UNIX, /* -spice unix */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
index ade80c8c81..df1eb5ecd3 100644
--- a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
@@ -180,6 +180,7 @@
   <flag name='name-guest'/>
   <flag name='qxl.max_outputs'/>
   <flag name='qxl-vga.max_outputs'/>
+  <flag name='spice-unix'/>
   <version>2004000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>
diff --git a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
index 81ec3312b1..83f1e146d8 100644
--- a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
@@ -184,6 +184,7 @@
   <flag name='name-guest'/>
   <flag name='qxl.max_outputs'/>
   <flag name='qxl-vga.max_outputs'/>
+  <flag name='spice-unix'/>
   <version>2005000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
index 47b5a941a2..c9f296542d 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
@@ -190,6 +190,7 @@
   <flag name='name-guest'/>
   <flag name='qxl.max_outputs'/>
   <flag name='qxl-vga.max_outputs'/>
+  <flag name='spice-unix'/>
   <version>2006000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>