diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a74277e..75b20e84 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,7 +11,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - fixed Applications cannot be launched as admin in a sandbox with "UseCreateToken/SandboxieAllGroup" enabled when using an MSFT account [#4022](https://github.com/sandboxie-plus/Sandboxie/issues/4022)
 - fixed Firefox issue with Sbie 1.14.1 and 1.14.2 [#4012](https://github.com/sandboxie-plus/Sandboxie/issues/4012)
   - rolled back the driver verifier fix added in 1.14.1
-
+- fixed CustomChromiumFlags and --single-argument issue [#4033](https://github.com/sandboxie-plus/Sandboxie/issues/4033)
 
 
 
diff --git a/Sandboxie/core/dll/kernel.c b/Sandboxie/core/dll/kernel.c
index 62f4390b..867c4cbb 100644
--- a/Sandboxie/core/dll/kernel.c
+++ b/Sandboxie/core/dll/kernel.c
@@ -112,12 +112,27 @@ _FX BOOLEAN Kernel_Init()
 			status = SbieApi_QueryConfAsIs(NULL, L"CustomChromiumFlags", 0, CustomChromiumFlags, ARRAYSIZE(CustomChromiumFlags));
 			if (NT_SUCCESS(status)) {
 
+				const WCHAR* lpCommandLine = ProcessParms->CommandLine.Buffer;
+				const WCHAR* lpArguments = SbieDll_FindArgumentEnd(lpCommandLine);
+				if (lpArguments == NULL)
+					lpArguments = wcsrchr(lpCommandLine, L'\0');
+
 				Kernel_CommandLineW.MaximumLength = ProcessParms->CommandLine.MaximumLength + (CONF_LINE_LEN + 8) * sizeof(WCHAR);
 				Kernel_CommandLineW.Buffer = LocalAlloc(LMEM_FIXED,Kernel_CommandLineW.MaximumLength);
-				wcscpy(Kernel_CommandLineW.Buffer, ProcessParms->CommandLine.Buffer);
-				if(Kernel_CommandLineW.Buffer[ProcessParms->CommandLine.Length/sizeof(WCHAR) - 1] != L' ')
+
+				// copy argument 0
+				wmemcpy(Kernel_CommandLineW.Buffer, lpCommandLine, lpArguments - lpCommandLine);
+				Kernel_CommandLineW.Buffer[lpArguments - lpCommandLine] = 0;
+				
+				// add custom arguments
+				if(Kernel_CommandLineW.Buffer[lpArguments - lpCommandLine - 1] != L' ')
 					wcscat(Kernel_CommandLineW.Buffer, L" ");
 				wcscat(Kernel_CommandLineW.Buffer, CustomChromiumFlags);
+
+				// add remaining arguments
+				wcscat(Kernel_CommandLineW.Buffer, lpArguments);
+
+
 				Kernel_CommandLineW.Length = wcslen(Kernel_CommandLineW.Buffer) * sizeof(WCHAR);
 
 				RtlUnicodeStringToAnsiString(&Kernel_CommandLineA, &Kernel_CommandLineW, TRUE);