diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf98e39d6..f61e28daf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1154,6 +1154,8 @@ add_library(${CoreLibName} ${CoreLinkType}
 	Core/HLE/KernelWaitHelpers.h
 	Core/HLE/__sceAudio.cpp
 	Core/HLE/__sceAudio.h
+	Core/HLE/sceAdler.cpp
+	Core/HLE/sceAdler.h
 	Core/HLE/sceAtrac.cpp
 	Core/HLE/sceAtrac.h
 	Core/HLE/sceAudio.cpp
diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index 86ee969ce..e28a0ae69 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -213,6 +213,7 @@
     <ClCompile Include="HLE\proAdhoc.cpp" />
     <ClCompile Include="HLE\proAdhocServer.cpp" />
     <ClCompile Include="HLE\ReplaceTables.cpp" />
+    <ClCompile Include="HLE\sceAdler.cpp" />
     <ClCompile Include="HLE\sceAtrac.cpp" />
     <ClCompile Include="HLE\sceAudio.cpp" />
     <ClCompile Include="HLE\sceAudiocodec.cpp" />
@@ -458,6 +459,7 @@
     <ClInclude Include="HLE\proAdhoc.h" />
     <ClInclude Include="HLE\proAdhocServer.h" />
     <ClInclude Include="HLE\ReplaceTables.h" />
+    <ClInclude Include="HLE\sceAdler.h" />
     <ClInclude Include="HLE\sceAtrac.h" />
     <ClInclude Include="HLE\sceAudio.h" />
     <ClInclude Include="HLE\sceAudiocodec.h" />
diff --git a/Core/Core.vcxproj.filters b/Core/Core.vcxproj.filters
index fc6dd3759..74bb12e08 100644
--- a/Core/Core.vcxproj.filters
+++ b/Core/Core.vcxproj.filters
@@ -165,6 +165,9 @@
     <ClCompile Include="HLE\sceKernelMutex.cpp">
       <Filter>HLE\Kernel</Filter>
     </ClCompile>
+    <ClCompile Include="HLE\sceAdler.cpp">
+      <Filter>HLE\Libraries</Filter>
+    </ClCompile>
     <ClCompile Include="HLE\sceAtrac.cpp">
       <Filter>HLE\Libraries</Filter>
     </ClCompile>
@@ -643,6 +646,9 @@
     <ClInclude Include="HLE\sceKernelMutex.h">
       <Filter>HLE\Kernel</Filter>
     </ClInclude>
+    <ClInclude Include="HLE\sceAdler.h">
+      <Filter>HLE\Libraries</Filter>
+    </ClInclude>
     <ClInclude Include="HLE\sceAtrac.h">
       <Filter>HLE\Libraries</Filter>
     </ClInclude>
diff --git a/Core/HLE/HLETables.cpp b/Core/HLE/HLETables.cpp
index bba5b44d1..f15f41bb9 100644
--- a/Core/HLE/HLETables.cpp
+++ b/Core/HLE/HLETables.cpp
@@ -70,6 +70,7 @@
 #include "sceMt19937.h"
 #include "sceUsbGps.h"
 #include "sceSha256.h"
+#include "sceAdler.h"
 
 #define N(s) s
 
@@ -332,5 +333,6 @@ void RegisterAllModules() {
 	Register_sceUsbGps();
 	Register_sceLibFttt();
 	Register_sceSha256();
+	Register_sceAdler();
 }
 
diff --git a/Core/HLE/sceAdler.cpp b/Core/HLE/sceAdler.cpp
new file mode 100644
index 000000000..788ea5881
--- /dev/null
+++ b/Core/HLE/sceAdler.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) 2012- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
+#include "../ext/zlib/zlib.h"
+
+#include "sceAdler.h"
+#include "Common/Log.h"
+#include "Core/HLE/HLE.h"
+#include "Core/HLE/FunctionWrappers.h"
+
+static u32 sceAdler32(u32 adler, u32 data, u32 datalen) {
+	if (!Memory::IsValidAddress(data) || !Memory::IsValidAddress(data + datalen)) {
+		ERROR_LOG(HLE, "sceAdler32(adler=%08x, data=%08x, datalen=%08x) - bad address(es)", adler, data, datalen);
+		return -1;
+	}
+	INFO_LOG(HLE, "sceAdler32(adler=%08x, data=%08x, datalen=%08x)", adler, data, datalen);
+
+	u8 *buf = Memory::GetPointerUnchecked(data);
+	u32 ret = adler32(adler, buf, datalen);
+
+	return ret;
+}
+
+const HLEFunction sceAdler[] =
+{
+	{ 0x9702EF11, WrapU_UUU<sceAdler32>, "sceAdler32" },
+};
+
+void Register_sceAdler()
+{
+	RegisterModule("sceAdler", ARRAY_SIZE(sceAdler), sceAdler);
+}
\ No newline at end of file
diff --git a/Core/HLE/sceAdler.h b/Core/HLE/sceAdler.h
new file mode 100644
index 000000000..b739adb61
--- /dev/null
+++ b/Core/HLE/sceAdler.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2012- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
+#pragma once
+
+void Register_sceAdler();
\ No newline at end of file
diff --git a/android/jni/Android.mk b/android/jni/Android.mk
index af2241bea..b0ce2a6be 100644
--- a/android/jni/Android.mk
+++ b/android/jni/Android.mk
@@ -219,6 +219,7 @@ EXEC_AND_LIB_FILES := \
   $(SRC)/Core/HLE/HLETables.cpp \
   $(SRC)/Core/HLE/ReplaceTables.cpp \
   $(SRC)/Core/HLE/HLE.cpp \
+  $(SRC)/Core/HLE/sceAdler.cpp \
   $(SRC)/Core/HLE/sceAtrac.cpp \
   $(SRC)/Core/HLE/__sceAudio.cpp.arm \
   $(SRC)/Core/HLE/sceAudio.cpp.arm \