diff --git a/vala/libpulse.vapi b/vala/libpulse.vapi
index 9e05b144f..b02bb5678 100644
--- a/vala/libpulse.vapi
+++ b/vala/libpulse.vapi
@@ -46,7 +46,7 @@ namespace PulseAudio {
         [CCode (cname="PA_CHECK_VERSION")]
         public bool CHECK_VERSION(int major, int minor, int micro);
 
-        [CCode (cname="INVALID_INDEX")]
+        [CCode (cname="PA_INVALID_INDEX")]
         public const uint32 INVALID_INDEX;
 
         [CCode (cname="pa_free_cb_t")]