diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -1350,13 +1350,13 @@
           "intend to set the base address");
 
   // Parse ELF{32,64}{LE,BE} and CPU type.
-  if (auto *arg = args.getLastArg(OPT_m)) {
-    StringRef s = arg->getValue();
+  auto emulation = args.getLastArgValue(OPT_m, getenv("LDEMULATION"));
+  if (!emulation.empty()) {
     std::tie(config->ekind, config->emachine, config->osabi) =
-        parseEmulation(s);
-    config->mipsN32Abi =
-        (s.startswith("elf32btsmipn32") || s.startswith("elf32ltsmipn32"));
-    config->emulation = s;
+        parseEmulation(emulation);
+    config->mipsN32Abi = (emulation.startswith("elf32btsmipn32") ||
+                          emulation.startswith("elf32ltsmipn32"));
+    config->emulation = emulation;
   }
 
   // Parse --hash-style={sysv,gnu,both}.
diff --git a/lld/MinGW/Driver.cpp b/lld/MinGW/Driver.cpp
--- a/lld/MinGW/Driver.cpp
+++ b/lld/MinGW/Driver.cpp
@@ -197,9 +197,11 @@
   add("lld-link");
   add("-lldmingw");
 
+  auto emulation = args.getLastArgValue(OPT_m, getenv("LDEMULATION"));
+
   if (auto *a = args.getLastArg(OPT_entry)) {
     StringRef s = a->getValue();
-    if (args.getLastArgValue(OPT_m) == "i386pe" && s.startswith("_"))
+    if (emulation == "i386pe" && s.startswith("_"))
       add("-entry:" + s.substr(1));
     else
       add("-entry:" + s);
@@ -312,8 +314,7 @@
   if (args.hasFlag(OPT_no_seh, OPT_disable_no_seh, false))
     add("-noseh");
 
-  if (args.getLastArgValue(OPT_m) != "thumb2pe" &&
-      args.getLastArgValue(OPT_m) != "arm64pe" &&
+  if (emulation != "thumb2pe" && emulation != "arm64pe" &&
       args.hasFlag(OPT_disable_dynamicbase, OPT_dynamicbase, false))
     add("-dynamicbase:no");
   if (args.hasFlag(OPT_disable_high_entropy_va, OPT_high_entropy_va, false))
@@ -362,18 +363,17 @@
     add("-opt:noicf");
   }
 
-  if (auto *a = args.getLastArg(OPT_m)) {
-    StringRef s = a->getValue();
-    if (s == "i386pe")
+  if (!emulation.empty()) {
+    if (emulation == "i386pe")
       add("-machine:x86");
-    else if (s == "i386pep")
+    else if (emulation == "i386pep")
       add("-machine:x64");
-    else if (s == "thumb2pe")
+    else if (emulation == "thumb2pe")
       add("-machine:arm");
-    else if (s == "arm64pe")
+    else if (emulation == "arm64pe")
       add("-machine:arm64");
     else
-      error("unknown parameter: -m" + s);
+      error("unknown parameter: -m" + emulation);
   }
 
   for (auto *a : args.filtered(OPT_mllvm))
@@ -382,7 +382,7 @@
   for (auto *a : args.filtered(OPT_Xlink))
     add(a->getValue());
 
-  if (args.getLastArgValue(OPT_m) == "i386pe")
+  if (emulation == "i386pe")
     add("-alternatename:__image_base__=___ImageBase");
   else
     add("-alternatename:__image_base__=__ImageBase");
diff --git a/lld/test/ELF/driver.test b/lld/test/ELF/driver.test
--- a/lld/test/ELF/driver.test
+++ b/lld/test/ELF/driver.test
@@ -2,6 +2,8 @@
 
 # RUN: not ld.lld --unknown1 --unkn=own2 -m foo /no/such/file -lnosuchlib \
 # RUN:   2>&1 | FileCheck -check-prefix=UNKNOWN %s
+# RUN: not env LDEMULTION=foo ld.lld --unknown1 --unkn=own2 /no/such/file -lnosuchlib \
+# RUN:   2>&1 | FileCheck -check-prefix=UNKNOWN %s
 
 # UNKNOWN: unknown argument '--unknown1'
 # UNKNOWN: unknown argument '--unkn=own2'
diff --git a/lld/test/MinGW/driver.test b/lld/test/MinGW/driver.test
--- a/lld/test/MinGW/driver.test
+++ b/lld/test/MinGW/driver.test
@@ -246,6 +246,7 @@
 VERSION: LLD {{.*}} (compatible with GNU linkers)
 
 RUN: ld.lld -m i386pep --help 2>&1 | FileCheck -check-prefix=HELP %s
+RUN: env LDEMULATION=i386pep ld.lld --help 2>&1 | FileCheck -check-prefix=HELP %s
 HELP: USAGE:
 HELP: --enable-auto-import
 
diff --git a/lld/tools/lld/lld.cpp b/lld/tools/lld/lld.cpp
--- a/lld/tools/lld/lld.cpp
+++ b/lld/tools/lld/lld.cpp
@@ -96,6 +96,11 @@
     return isPETargetName(*(it + 1));
   }
 
+  StringRef emulationEnv = getenv("LDEMULATION");
+  if (!emulationEnv.empty()) {
+    return isPETargetName(emulationEnv);
+  }
+
 #ifdef LLD_DEFAULT_LD_LLD_IS_MINGW
   return true;
 #else