diff --git a/src/libqof/qof/Makefile.am b/src/libqof/qof/Makefile.am
index e203367ed5..8afe29984e 100644
--- a/src/libqof/qof/Makefile.am
+++ b/src/libqof/qof/Makefile.am
@@ -71,7 +71,7 @@ qofinclude_HEADERS = \
 noinst_HEADERS = \
    md5.h  \
    qofclass-p.h  \
-   qofmath128.h  \
+   qofmath128-p.h  \
    qofquery-p.h  \
    qofbook-p.h  \
    qofevent-p.h \
diff --git a/src/libqof/qof/gnc-numeric.c b/src/libqof/qof/gnc-numeric.c
index 16d9dadfe1..bd62a576c3 100644
--- a/src/libqof/qof/gnc-numeric.c
+++ b/src/libqof/qof/gnc-numeric.c
@@ -34,7 +34,7 @@
 #include <string.h>
 
 #include "gnc-numeric.h"
-#include "qofmath128.c"
+#include "qofmath128.c" /* FIXME: Why is this C file included here?!? */
 
 /* static short module = MOD_ENGINE; */
 
diff --git a/src/libqof/qof/qofmath128.h b/src/libqof/qof/qofmath128-p.h
similarity index 100%
rename from src/libqof/qof/qofmath128.h
rename to src/libqof/qof/qofmath128-p.h
diff --git a/src/libqof/qof/qofmath128.c b/src/libqof/qof/qofmath128.c
index e97699b288..d7a3075ff5 100644
--- a/src/libqof/qof/qofmath128.c
+++ b/src/libqof/qof/qofmath128.c
@@ -22,7 +22,7 @@
  *******************************************************************/
 
 #include "config.h"
-#include "qofmath128.h"
+#include "qofmath128-p.h"
 
 #include <glib.h>