diff --git a/dev-cpp/abseil-cpp/abseil_cpp-20210324.2.recipe b/dev-cpp/abseil-cpp/abseil_cpp-20210324.2.recipe
index aa9672af7..eb37dd269 100644
--- a/dev-cpp/abseil-cpp/abseil_cpp-20210324.2.recipe
+++ b/dev-cpp/abseil-cpp/abseil_cpp-20210324.2.recipe
@@ -4,10 +4,11 @@ C++11) designed to augment the C++ standard library."
 HOMEPAGE="https://abseil.io"
 COPYRIGHT="2017-2021 The Abseil Authors"
 LICENSE="Apache v2"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="http://github.com/abseil/abseil-cpp/archive/$portVersion/abseil-$portVersion.tar.gz"
 CHECKSUM_SHA256="59b862f50e710277f8ede96f083a5bb8d7c9595376146838b9580be90374ee1f"
 SOURCE_DIR="abseil-cpp-$portVersion"
+PATCHES="abseil_cpp-$portVersion.patchset"
 
 ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
diff --git a/dev-cpp/abseil-cpp/patches/abseil_cpp-20210324.2.patchset b/dev-cpp/abseil-cpp/patches/abseil_cpp-20210324.2.patchset
new file mode 100644
index 000000000..c5248dc08
--- /dev/null
+++ b/dev-cpp/abseil-cpp/patches/abseil_cpp-20210324.2.patchset
@@ -0,0 +1,31 @@
+From 3724b2ecb515c4440bb3a22ed39733ba2a1737d8 Mon Sep 17 00:00:00 2001
+From: Jerome Duval <jerome.duval@gmail.com>
+Date: Mon, 18 Oct 2021 14:37:02 +0200
+Subject: Haiku: mmap and alarm supported
+
+
+diff --git a/absl/base/config.h b/absl/base/config.h
+index 9544996..a172b02 100644
+--- a/absl/base/config.h
++++ b/absl/base/config.h
+@@ -372,7 +372,7 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
+ #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) ||   \
+     defined(__ros__) || defined(__native_client__) || defined(__asmjs__) || \
+     defined(__wasm__) || defined(__Fuchsia__) || defined(__sun) || \
+-    defined(__ASYLO__) || defined(__myriad2__)
++    defined(__ASYLO__) || defined(__myriad2__) || defined(__HAIKU__)
+ #define ABSL_HAVE_MMAP 1
+ #endif
+ 
+@@ -430,7 +430,7 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
+ #elif defined(__GOOGLE_GRTE_VERSION__)
+ // feature tests for Google's GRTE
+ #define ABSL_HAVE_ALARM 1
+-#elif defined(__GLIBC__)
++#elif defined(__GLIBC__) || defined(__HAIKU__)
+ // feature test for glibc
+ #define ABSL_HAVE_ALARM 1
+ #elif defined(_MSC_VER)
+-- 
+2.30.2
+