diff --git a/oscar64.md b/oscar64.md
index cfe5acb..357f092 100644
--- a/oscar64.md
+++ b/oscar64.md
@@ -139,6 +139,7 @@ The compiler is command line driven, and creates an executable .prg file.
 * -xz : extended zero page usage, more zero page space, but no return to basic
 * -cid : cartridge type ID, used by vice emulator
 * -pp : compile in C++ mode
+* -strict : use strict ANSI C parsing (no C++ goodies)
 * -psci : use PETSCII encoding for all strings without prefix
 * -rmp : generate error files .error.map, .error.asm when linker fails
 
diff --git a/oscar64/CompilerTypes.h b/oscar64/CompilerTypes.h
index 4d93c9b..64187b5 100644
--- a/oscar64/CompilerTypes.h
+++ b/oscar64/CompilerTypes.h
@@ -42,6 +42,7 @@ static const uint64 COPT_PETSCII = 1ULL << 53;
 static const uint64 COPT_ERROR_FILES = 1ULL << 54;
 
 static const uint64 COPT_PROFILEINFO = 1ULL << 55;
+static const uint64 COPT_STRICT = 1ULL << 56;
 
 
 
diff --git a/oscar64/Parser.cpp b/oscar64/Parser.cpp
index 03c85e3..b88a7ec 100644
--- a/oscar64/Parser.cpp
+++ b/oscar64/Parser.cpp
@@ -1447,7 +1447,7 @@ Declaration * Parser::ParseFunctionDeclaration(Declaration* bdec)
 
 					adec->mSize = adec->mBase->mSize;
 
-					if ((mCompilerOptions & COPT_CPLUSPLUS) && ConsumeTokenIf(TK_ASSIGN))
+					if (((mCompilerOptions & COPT_CPLUSPLUS) || !(mCompilerOptions & COPT_STRICT)) && ConsumeTokenIf(TK_ASSIGN))
 					{
 						adec->mValue = ParseExpression(false);
 					}
diff --git a/oscar64/oscar64.cpp b/oscar64/oscar64.cpp
index c2e8d03..307323d 100644
--- a/oscar64/oscar64.cpp
+++ b/oscar64/oscar64.cpp
@@ -321,7 +321,13 @@ int main2(int argc, const char** argv)
 				{
 					compiler->mCompilerOptions |= COPT_CPLUSPLUS;
 					compiler->AddDefine(Ident::Unique("__cplusplus"), "1");
+					compiler->AddDefine(Ident::Unique("__cplusplus__"), "1");
 				}
+				else if (arg[1] == 's' && arg[2] == 't' && arg[3] == 'r' && arg[4] == 'i' && arg[5] == 'c' && arg[6] == 't' && !arg[7])
+				{
+					compiler->mCompilerOptions |= COPT_STRICT;
+					compiler->AddDefine(Ident::Unique("__strict__"), "1");
+					}
 				else if (arg[1] == 'r' && arg[2] == 'm' && arg[3] == 'p' && !arg[4])
 				{
 					compiler->mCompilerOptions |= COPT_ERROR_FILES;
@@ -339,6 +345,7 @@ int main2(int argc, const char** argv)
 				{
 					compiler->mCompilerOptions |= COPT_CPLUSPLUS;
 					compiler->AddDefine(Ident::Unique("__cplusplus"), "1");
+					compiler->AddDefine(Ident::Unique("__cplusplus__"), "1");
 				}
 
 				compiler->mCompilationUnits->AddUnit(loc, argv[i], nullptr);