diff --git a/system/udftools/udftools-1.0.0b3-gcc5.patch b/system/udftools/udftools-1.0.0b3-gcc5.patch
new file mode 100644
index 0000000000..244683c5b0
--- /dev/null
+++ b/system/udftools/udftools-1.0.0b3-gcc5.patch
@@ -0,0 +1,13 @@
+--- udftools-1.0.0b3/include/libudffs.h	2004-02-23 04:33:11.000000000 +0100
++++ udftools-1.0.0b3/include/libudffs.h	2015-06-27 18:53:17.000000000 +0200
+@@ -169,8 +169,8 @@
+ struct udf_data *alloc_data(void *, int);
+ 
+ /* desc.c */
+-inline struct impUseVolDescImpUse *query_iuvdiu(struct udf_disc *);
+-inline struct logicalVolIntegrityDescImpUse *query_lvidiu(struct udf_disc *);
++extern inline struct impUseVolDescImpUse *query_iuvdiu(struct udf_disc *);
++extern inline struct logicalVolIntegrityDescImpUse *query_lvidiu(struct udf_disc *);
+ 
+ /* file.c */
+ tag query_tag(struct udf_disc *, struct udf_extent *, struct udf_desc *, uint16_t);
diff --git a/system/udftools/udftools.SlackBuild b/system/udftools/udftools.SlackBuild
index 513700b941..8f209ab7a5 100644
--- a/system/udftools/udftools.SlackBuild
+++ b/system/udftools/udftools.SlackBuild
@@ -23,7 +23,7 @@
 
 PRGNAM=udftools
 VERSION=${VERSION:-1.0.0b3}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
@@ -53,6 +53,8 @@ else
   LIBDIRSUFFIX=""
 fi
 
+set -e
+
 rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
@@ -68,6 +70,9 @@ find -L . \
 
 patch -p1 < $CWD/fix-compiler-errors.patch
 
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778153
+patch -p1 < $CWD/udftools-1.0.0b3-gcc5.patch
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \