diff --git a/ext/flite/gstflitetestsrc.c b/ext/flite/gstflitetestsrc.c
index 1dc259df40..5d7e1f1c14 100644
--- a/ext/flite/gstflitetestsrc.c
+++ b/ext/flite/gstflitetestsrc.c
@@ -85,7 +85,7 @@ GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS ("audio/x-raw, "
-        "format = (string) " GST_AUDIO_NE (s16) ", "
+        "format = (string) " GST_AUDIO_NE (S16) ", "
         "layout = (string) interleaved, "
         "rate = (int) 48000, " "channels = (int) [1, 8]")
     );