diff --git a/provisioner/powershell/provisioner.go b/provisioner/powershell/provisioner.go
index a0e70275d..a862ef9b3 100644
--- a/provisioner/powershell/provisioner.go
+++ b/provisioner/powershell/provisioner.go
@@ -112,7 +112,7 @@ func (p *Provisioner) Prepare(raws ...interface{}) error {
 	}
 
 	if p.config.EnvVarFormat == "" {
-		p.config.EnvVarFormat = `$env:%s="%s"; `
+		p.config.EnvVarFormat = `$env:%s=\"%s\"; `
 	}
 
 	if p.config.ElevatedEnvVarFormat == "" {
diff --git a/provisioner/powershell/provisioner_test.go b/provisioner/powershell/provisioner_test.go
index 0f0fca79f..78484c184 100644
--- a/provisioner/powershell/provisioner_test.go
+++ b/provisioner/powershell/provisioner_test.go
@@ -389,7 +389,7 @@ func TestProvisionerProvision_Inline(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	expectedCommand := `powershell "& { $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; c:/Windows/Temp/inlineScript.bat; exit $LastExitCode}"`
+	expectedCommand := `powershell "& { $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; c:/Windows/Temp/inlineScript.bat; exit $LastExitCode}"`
 
 	// Should run the command without alteration
 	if comm.StartCmd.Command != expectedCommand {
@@ -408,7 +408,7 @@ func TestProvisionerProvision_Inline(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	expectedCommand = `powershell "& { $env:BAR="BAZ"; $env:FOO="BAR"; $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; c:/Windows/Temp/inlineScript.bat; exit $LastExitCode}"`
+	expectedCommand = `powershell "& { $env:BAR=\"BAZ\"; $env:FOO=\"BAR\"; $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; c:/Windows/Temp/inlineScript.bat; exit $LastExitCode}"`
 
 	// Should run the command without alteration
 	if comm.StartCmd.Command != expectedCommand {
@@ -435,7 +435,7 @@ func TestProvisionerProvision_Scripts(t *testing.T) {
 	}
 
 	//powershell -Command "$env:PACKER_BUILDER_TYPE=''"; powershell -Command "$env:PACKER_BUILD_NAME='foobuild'";  powershell -Command c:/Windows/Temp/script.ps1
-	expectedCommand := `powershell "& { $env:PACKER_BUILDER_TYPE="footype"; $env:PACKER_BUILD_NAME="foobuild"; c:/Windows/Temp/script.ps1; exit $LastExitCode}"`
+	expectedCommand := `powershell "& { $env:PACKER_BUILDER_TYPE=\"footype\"; $env:PACKER_BUILD_NAME=\"foobuild\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}"`
 
 	// Should run the command without alteration
 	if comm.StartCmd.Command != expectedCommand {
@@ -468,7 +468,7 @@ func TestProvisionerProvision_ScriptsWithEnvVars(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	expectedCommand := `powershell "& { $env:BAR="BAZ"; $env:FOO="BAR"; $env:PACKER_BUILDER_TYPE="footype"; $env:PACKER_BUILD_NAME="foobuild"; c:/Windows/Temp/script.ps1; exit $LastExitCode}"`
+	expectedCommand := `powershell "& { $env:BAR=\"BAZ\"; $env:FOO=\"BAR\"; $env:PACKER_BUILDER_TYPE=\"footype\"; $env:PACKER_BUILD_NAME=\"foobuild\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}"`
 
 	// Should run the command without alteration
 	if comm.StartCmd.Command != expectedCommand {
@@ -545,7 +545,7 @@ func TestProvisioner_createFlattenedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; " {
+	if flattenedEnvVars != "$env:PACKER_BUILDER_TYPE=\\\"iso\\\"; $env:PACKER_BUILD_NAME=\\\"vmware\\\"; " {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 
@@ -556,7 +556,7 @@ func TestProvisioner_createFlattenedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:FOO=\"bar\"; $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; " {
+	if flattenedEnvVars != "$env:FOO=\\\"bar\\\"; $env:PACKER_BUILDER_TYPE=\\\"iso\\\"; $env:PACKER_BUILD_NAME=\\\"vmware\\\"; " {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 
@@ -567,7 +567,7 @@ func TestProvisioner_createFlattenedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:BAZ=\"qux\"; $env:FOO=\"bar\"; $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; " {
+	if flattenedEnvVars != "$env:BAZ=\\\"qux\\\"; $env:FOO=\\\"bar\\\"; $env:PACKER_BUILDER_TYPE=\\\"iso\\\"; $env:PACKER_BUILD_NAME=\\\"vmware\\\"; " {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 }
@@ -582,7 +582,7 @@ func TestProvision_createCommandText(t *testing.T) {
 
 	// Non-elevated
 	cmd, _ := p.createCommandText()
-	if cmd != "powershell \"& { $env:PACKER_BUILDER_TYPE=\"\"; $env:PACKER_BUILD_NAME=\"\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}\"" {
+	if cmd != "powershell \"& { $env:PACKER_BUILDER_TYPE=\\\"\\\"; $env:PACKER_BUILD_NAME=\\\"\\\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}\"" {
 		t.Fatalf("Got unexpected non-elevated command: %s", cmd)
 	}