diff --git a/gap-float.changes b/gap-float.changes
index 321ecf8..3a8f279 100644
--- a/gap-float.changes
+++ b/gap-float.changes
@@ -3,6 +3,7 @@ Sun Oct 16 18:46:55 UTC 2016 - jengelh@inai.de
 
 - Update to new upstream release 0.7.4
 * No changelog was provided again
+- Drop incl.diff
 
 -------------------------------------------------------------------
 Sun Jun 19 10:53:54 UTC 2016 - jengelh@inai.de
diff --git a/gap-float.spec b/gap-float.spec
index 25c09eb..986ceaf 100644
--- a/gap-float.spec
+++ b/gap-float.spec
@@ -26,7 +26,6 @@ Url:            http://laurentbartholdi.github.com/float/
 
 #Git-Clone:	git://github.com/laurentbartholdi/float/
 Source:         ftp://ftp.gap-system.org/pub/gap/gap4/tar.bz2/packages/float-%version.tar.bz2
-Patch1:         incl.diff
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -49,7 +48,6 @@ FPLLL.
 
 %prep
 %setup -qn float-%version
-%patch -P 1 -p1
 
 %build
 autoreconf -fi
diff --git a/incl.diff b/incl.diff
deleted file mode 100644
index bfcc2e0..0000000
--- a/incl.diff
+++ /dev/null
@@ -1,79 +0,0 @@
-From: Jan Engelhardt <jengelh@inai.de>
-Date: 2014-06-18 19:13:44.267333132 +0200
-
-The project builds C++ files, but _CFLAGS only applies to .c files.
-The flags must go into _CPPFLAGS for all languages' preprocessor.
----
- m4/ac_check_cxsc.m4 |   12 ++++++------
- src/Makefile.am     |    2 +-
- 2 files changed, 7 insertions(+), 7 deletions(-)
-
-Index: float-0.7.3/m4/ac_check_cxsc.m4
-===================================================================
---- float-0.7.3.orig/m4/ac_check_cxsc.m4
-+++ float-0.7.3/m4/ac_check_cxsc.m4
-@@ -1,5 +1,5 @@
- # check for cxsc library
--# sets CXSC_CFLAGS, CXSC_LDFLAGS, CXSC_MAKELIB and CXSC_LIBS,
-+# sets CXSC_CPPFLAGS, CXSC_LDFLAGS, CXSC_MAKELIB and CXSC_LIBS,
- # and CXSC_WITH, CXSC_DEPEND,
- # and CXSC=yes/no/extern
- 
-@@ -43,7 +43,7 @@ AC_ARG_WITH(cxsc,
-   else
-     CXSC_WITH="$CXSC_WITH --with-cxsc=$withval"
-     CXSC=yes
--    CXSC_CFLAGS="-I$withval/include"; CXSC_LDFLAGS="-L$withval/lib"
-+    CXSC_CPPFLAGS="-I$withval/include"; CXSC_LDFLAGS="-L$withval/lib"
-   fi]
- )
- 
-@@ -52,7 +52,7 @@ AC_ARG_WITH(cxsc-include,
-     Location at which the cxsc include files were installed.],
-  [CXSC=yes
-   CXSC_WITH="$CXSC_WITH --with-cxsc-include=$withval"
--  CXSC_CFLAGS="-I$withval"]
-+  CXSC_CPPFLAGS="-I$withval"]
- )
- 
- AC_ARG_WITH(cxsc-lib,
-@@ -72,7 +72,7 @@ if test "$CXSC" != extern; then
- 
- AC_LANG_PUSH([C++])
- temp_status=true
--CPPFLAGS="$CPPFLAGS $CXSC_CFLAGS"
-+CPPFLAGS="$CPPFLAGS $CXSC_CPPFLAGS"
- AC_CHECK_HEADER(real.hpp,,[temp_status=false])
- LDFLAGS="$LDFLAGS $CXSC_LDFLAGS"
- AC_CHECK_LIB(cxsc,z_zadd,,[temp_status=false])
-@@ -93,7 +93,7 @@ fi
- if test "$CXSC" = extern; then
- 
- MAKE_LIBTARGETS="$MAKE_LIBTARGETS cxsc"
--CXSC_CFLAGS='-I$(EXTERN)/include'
-+CXSC_CPPFLAGS='-I$(EXTERN)/include'
- CXSC_LDFLAGS='-L$(EXTERN)/lib'
- 
- CXSC_WITH='--with-cxsc=$(EXTERN)'
-@@ -110,7 +110,7 @@ LIBS="$temp_LIBS"
- if test "$CXSC" != no; then
-     AC_DEFINE([USE_CXSC],1,[use CXSC library])
- fi
--AC_SUBST(CXSC_CFLAGS)
-+AC_SUBST([CXSC_CPPFLAGS])
- AC_SUBST(CXSC_LDFLAGS)
- AC_SUBST(CXSC_LIBS)
- AC_SUBST(CXSC_MAKELIB)
-Index: float-0.7.3/src/Makefile.am
-===================================================================
---- float-0.7.3.orig/src/Makefile.am
-+++ float-0.7.3/src/Makefile.am
-@@ -48,7 +48,7 @@ endif ## WITH_MPFR_IS_YES
- 
- if WITH_CXSC_IS_YES
- float_la_SOURCES +=	cxsc.C cxsc_poly.C
--float_la_CFLAGS += $(CXSC_CFLAGS)
-+float_la_CPPFLAGS += $(CXSC_CPPFLAGS)
- float_la_LDFLAGS += $(CXSC_LDFLAGS)
- float_la_LIBADD += $(CXSC_LIBS)
- endif