diff --git a/gst/qtdemux/qtdemux.c b/gst/qtdemux/qtdemux.c
index 055e8f863b..ba6d4c783c 100644
--- a/gst/qtdemux/qtdemux.c
+++ b/gst/qtdemux/qtdemux.c
@@ -6040,13 +6040,14 @@ qtdemux_tag_add_location (GstQTDemux * qtdemux, const char *tag,
 
   /* +1 +1 = skip null-terminator and location role byte */
   offset += 1 + 1;
-  longitude = QT_FP32 (data + offset);
+  /* table in spec says unsigned, semantics say negative has meaning ... */
+  longitude = QT_SFP32 (data + offset);
 
   offset += 4;
-  latitude = QT_FP32 (data + offset);
+  latitude = QT_SFP32 (data + offset);
 
   offset += 4;
-  altitude = QT_FP32 (data + offset);
+  altitude = QT_SFP32 (data + offset);
 
   /* one invalid means all are invalid */
   if (longitude >= -180.0 && longitude <= 180.0 &&
diff --git a/gst/qtdemux/qtdemux_types.h b/gst/qtdemux/qtdemux_types.h
index 8148cb9a7a..e5c0bd62c9 100644
--- a/gst/qtdemux/qtdemux_types.h
+++ b/gst/qtdemux/qtdemux_types.h
@@ -38,6 +38,7 @@ typedef struct _QtNodeType QtNodeType;
 #define QT_UINT16(a)  (GST_READ_UINT16_BE(a))
 #define QT_UINT8(a)   (GST_READ_UINT8(a))
 #define QT_FP32(a)    ((GST_READ_UINT32_BE(a))/65536.0)
+#define QT_SFP32(a)   (((gint)(GST_READ_UINT32_BE(a)))/65536.0)
 #define QT_FP16(a)    ((GST_READ_UINT16_BE(a))/256.0)
 #define QT_FOURCC(a)  (GST_READ_UINT32_LE(a))
 #define QT_UINT64(a)  ((((guint64)QT_UINT32(a))<<32)|QT_UINT32(((guint8 *)a)+4))