diff --git a/dmd/globals.d b/dmd/globals.d
index 464b8926..1d9befe1 100644
--- a/dmd/globals.d
+++ b/dmd/globals.d
@@ -123,6 +123,7 @@ struct Param
     bool is64bit = (size_t.sizeof == 8);  // generate 64 bit code; true by default for 64 bit dmd
     bool isLP64;            // generate code for LP64
     bool isLinux;           // generate code for linux
+    bool isAndroid;         // generate code for Android
     bool isOSX;             // generate code for Mac OSX
     bool isWindows;         // generate code for Windows
     bool isFreeBSD;         // generate code for FreeBSD
diff --git a/dmd/globals.h b/dmd/globals.h
index 24cd4912..df8a71bd 100644
--- a/dmd/globals.h
+++ b/dmd/globals.h
@@ -100,6 +100,7 @@ struct Param
     bool is64bit;       // generate 64 bit code
     bool isLP64;        // generate code for LP64
     bool isLinux;       // generate code for linux
+    bool isAndroid;     // generate code for Android
     bool isOSX;         // generate code for Mac OSX
     bool isWindows;     // generate code for Windows
     bool isFreeBSD;     // generate code for FreeBSD
diff --git a/driver/main.cpp b/driver/main.cpp
index 26c61e94..f9ec7f7b 100644
--- a/driver/main.cpp
+++ b/driver/main.cpp
@@ -1023,6 +1023,7 @@ int cppmain(int argc, char **argv) {
     llvm::Triple *triple = new llvm::Triple(gTargetMachine->getTargetTriple());
     global.params.targetTriple = triple;
     global.params.isLinux = triple->isOSLinux();
+    global.params.isAndroid = triple->getEnvironment() == llvm::Triple::Android;
     global.params.isOSX = triple->isOSDarwin();
     global.params.isWindows = triple->isOSWindows();
     global.params.isFreeBSD = triple->isOSFreeBSD();
diff --git a/dmd/dmangle.d b/dmd/dmangle.d
index 9fa8593b..ae29e307 100644
--- a/dmd/dmangle.d
+++ b/dmd/dmangle.d
@@ -911,9 +911,13 @@ public:
             buf.writestring(value < CTFloat.zero ? "NINF" : "INF");
         else
         {
+            version (IN_LLVM) import gen.llvmhelpers;
             enum BUFFER_LEN = 36;
             char[BUFFER_LEN] buffer;
-            const n = CTFloat.sprint(buffer.ptr, 'A', value);
+            // sprintf/printf with hex formatting is broken for certain long
+            // doubles on Android/x64, so use decimal format instead.
+            char fmt = global.params.isAndroid && isArchx86_64() ? 'g' : 'A';
+            const n = CTFloat.sprint(buffer.ptr, fmt, value);
             assert(n < BUFFER_LEN);
             for (int i = 0; i < n; i++)
             {