diff --git a/0105-curl-7.63.0-lib1560-valgrind.patch b/0105-curl-7.63.0-lib1560-valgrind.patch
new file mode 100644
index 0000000..40d0a9b
--- /dev/null
+++ b/0105-curl-7.63.0-lib1560-valgrind.patch
@@ -0,0 +1,39 @@
+From f55cca0e86f59ec11ffafd5c0503c39ca3723e2e Mon Sep 17 00:00:00 2001
+From: Kamil Dudka <kdudka@redhat.com>
+Date: Mon, 4 Feb 2019 17:32:56 +0100
+Subject: [PATCH] libtest: compile lib1560.c with -fno-builtin-strcmp
+
+... to prevent valgrind from reporting false positives on x86_64:
+
+Conditional jump or move depends on uninitialised value(s)
+   at 0x10BCAA: part2id (lib1560.c:489)
+   by 0x10BCAA: updateurl (lib1560.c:521)
+   by 0x10BCAA: set_parts (lib1560.c:630)
+   by 0x10BCAA: test (lib1560.c:802)
+   by 0x4923412: (below main) (in /usr/lib64/libc-2.28.9000.so)
+
+Conditional jump or move depends on uninitialised value(s)
+   at 0x10BCC3: part2id (lib1560.c:491)
+   by 0x10BCC3: updateurl (lib1560.c:521)
+   by 0x10BCC3: set_parts (lib1560.c:630)
+   by 0x10BCC3: test (lib1560.c:802)
+   by 0x4923412: (below main) (in /usr/lib64/libc-2.28.9000.so)
+---
+ tests/libtest/Makefile.inc | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/tests/libtest/Makefile.inc b/tests/libtest/Makefile.inc
+index 080421b..ea3b806 100644
+--- a/tests/libtest/Makefile.inc
++++ b/tests/libtest/Makefile.inc
+@@ -516,6 +516,7 @@ lib1557_LDADD = $(TESTUTIL_LIBS)
+ lib1557_CPPFLAGS = $(AM_CPPFLAGS) -DLIB1557
+ 
+ lib1560_SOURCES = lib1560.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
++lib1560_CFLAGS = $(AM_CFLAGS) -fno-builtin-strcmp
+ lib1560_LDADD = $(TESTUTIL_LIBS)
+ 
+ lib1900_SOURCES = lib1900.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
+-- 
+2.17.2
+
diff --git a/curl.spec b/curl.spec
index 4600a84..ce957f6 100644
--- a/curl.spec
+++ b/curl.spec
@@ -1,7 +1,7 @@
 Summary: A utility for getting files from remote servers (FTP, HTTP, and others)
 Name: curl
 Version: 7.63.0
-Release: 6%{?dist}
+Release: 7%{?dist}
 License: MIT
 Source: https://curl.haxx.se/download/%{name}-%{version}.tar.xz
 
@@ -29,6 +29,9 @@ Patch103: 0103-curl-7.59.0-python3.patch
 # use localhost6 instead of ip6-localhost in the curl test-suite
 Patch104: 0104-curl-7.19.7-localhost6.patch
 
+# prevent valgrind from reporting false positives on x86_64
+Patch105: 0105-curl-7.63.0-lib1560-valgrind.patch
+
 Provides: curl-full = %{version}-%{release}
 Provides: webclient
 URL: https://curl.haxx.se/
@@ -185,6 +188,7 @@ be installed.
 %patch102 -p1
 %patch103 -p1
 %patch104 -p1
+%patch105 -p1
 
 # make tests/*.py use Python 3
 sed -e '1 s|^#!/.*python|#!%{__python3}|' -i tests/*.py
@@ -345,6 +349,9 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
 %{_libdir}/libcurl.so.4.[0-9].[0-9].minimal
 
 %changelog
+* Mon Feb 04 2019 Kamil Dudka <kdudka@redhat.com> - 7.63.0-7
+- prevent valgrind from reporting false positives on x86_64
+
 * Thu Jan 31 2019 Fedora Release Engineering <releng@fedoraproject.org> - 7.63.0-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild