diff --git a/m4/jpeg.m4 b/m4/jpeg.m4
index 60b8d774..766b4aea 100644
--- a/m4/jpeg.m4
+++ b/m4/jpeg.m4
@@ -1,4 +1,4 @@
 AC_DEFUN([AC_FLDIGI_JPEG], [
-    AC_CHECK_HEADER([jpeglib.h], [], [AC_MSG_FAILURE([could not find jpeglib.j])])
+    AC_CHECK_HEADER([jpeglib.h], [], [AC_MSG_FAILURE([could not find jpeglib.h])])
     AC_CHECK_LIB([jpeg], [jpeg_abort], [], [AC_MSG_FAILURE([could not find -ljpeg])])
 ])