diff --git a/coders/webp.c b/coders/webp.c
index 5f20fb7..398364d 100644
--- a/coders/webp.c
+++ b/coders/webp.c
@@ -76,6 +76,40 @@
WriteWEBPImage(const ImageInfo *,Image *,ExceptionInfo *);
#endif
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% I s W E B P %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% IsWEBP() returns MagickTrue if the image format type, identified by the
+% magick string, is WebP.
+%
+% The format of the IsWEBP method is:
+%
+% MagickBooleanType IsWEBP(const unsigned char *magick,const size_t length)
+%
+% A description of each parameter follows:
+%
+% o magick: compare image format pattern against these bytes.
+%
+% o length: Specifies the length of the magick string.
+%
+*/
+static MagickBooleanType IsWEBP(const unsigned char *magick,const size_t length)
+{
+ if (length < 12)
+ return(MagickFalse);
+ if (LocaleNCompare((const char *) magick+8,"WEBP",4) == 0)
+ return(MagickTrue);
+ return(MagickFalse);
+}
+
#if defined(MAGICKCORE_WEBP_DELEGATE)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -253,6 +287,7 @@
entry->description=ConstantString("WebP Image Format");
entry->adjoin=MagickFalse;
entry->module=ConstantString("WEBP");
+ entry->magick=(IsImageFormatHandler *) IsWEBP;
if (*version != '\0')
entry->version=ConstantString(version);
(void) RegisterMagickInfo(entry);
