diff --git a/src/julec/compile.jule b/src/julec/compile.jule
index 7a6e066fc..5027f0980 100644
--- a/src/julec/compile.jule
+++ b/src/julec/compile.jule
@@ -312,6 +312,7 @@ fn checkFlags(&args: []str): []str {
 	fs.AddVar[bool](unsafe { (&bool)(&opt::Array) }, "opt-array", 0, "Array optimizations")
 	fs.AddVar[bool](unsafe { (&bool)(&opt::Len) }, "opt-len", 0, "Len optimizations")
 	fs.AddVar[bool](unsafe { (&bool)(&opt::StdStrings) }, "opt-std-strings", 0, "Special optimizations for the std/strings package")
+	fs.AddVar[bool](unsafe { (&bool)(&opt::StdMathCmplx) }, "opt-std-math-cmplx", 0, "Special optimizations for the std/math/cmplx package")
 
 	mut content := fs.Parse(args) else {
 		handle::Throw(str(error))
diff --git a/src/julec/obj/meta.jule b/src/julec/obj/meta.jule
index d580117a1..4a237a455 100644
--- a/src/julec/obj/meta.jule
+++ b/src/julec/obj/meta.jule
@@ -8,6 +8,7 @@ use "std/jule/sema"
 // Linkpath of common packages.
 const linkpathRuntime = "std/runtime"
 const linkpathStrings = "std/strings"
+const linkpathMathCmplx = "std/math/cmplx"
 
 // Program metadata for the main IR.
 // All required packages use this metada collection instead of
@@ -42,10 +43,26 @@ struct MetaRuntime {
 	MapIterator: &sema::Struct
 }
 
+// Metadata for the std/math/cmplx package.
+struct MetaMathCmplx {
+	Cmplx: &sema::StructIns // Cmplx
+
+	CmplxAdd:  &sema::FnIns // Cmplx.Add
+	CmplxSub:  &sema::FnIns // Cmplx.Sub
+	CmplxMul:  &sema::FnIns // Cmplx.Mul
+	CmplxDiv:  &sema::FnIns // Cmplx.Div
+	CmplxAddZ: &sema::FnIns // Cmplx.add
+	CmplxSubZ: &sema::FnIns // Cmplx.sub
+	CmplxMulZ: &sema::FnIns // Cmplx.mul
+	CmplxDivZ: &sema::FnIns // Cmplx.div
+}
+
 // Metadata for common objects.
 struct Meta {
 	Runtime:    &MetaRuntime
 	StrBuilder: &MetaStrBuilder
+	MathCmplx:  &MetaMathCmplx
+
 	EntryPoint: &sema::Fn
 }
 
@@ -55,6 +72,7 @@ impl Meta {
 		mut meta := new(Meta)
 		meta.Runtime = Meta.CollectRuntime(ir)
 		meta.StrBuilder = Meta.CollectStrBuilder(ir)
+		meta.MathCmplx = Meta.CollectMathCmplx(ir)
 		ret meta
 	}
 
@@ -100,4 +118,26 @@ impl Meta {
 		}
 		ret meta
 	}
+
+	// Collects MetaMathCmplx from IR if possible.
+	static fn CollectMathCmplx(mut &ir: &IR): &MetaMathCmplx {
+		mut p := SelectImport(ir.Used, linkpathMathCmplx)
+		if p == nil {
+			ret nil
+		}
+		mut meta := new(MetaMathCmplx)
+
+		const Static = false
+		meta.Cmplx = RuntimeFindStruct(p, "Cmplx").Instances[0]
+		meta.CmplxAdd = meta.Cmplx.FindMethod("Add", Static).Instances[0]
+		meta.CmplxSub = meta.Cmplx.FindMethod("Sub", Static).Instances[0]
+		meta.CmplxMul = meta.Cmplx.FindMethod("Mul", Static).Instances[0]
+		meta.CmplxDiv = meta.Cmplx.FindMethod("Div", Static).Instances[0]
+		meta.CmplxAddZ = meta.Cmplx.FindMethod("add", Static).Instances[0]
+		meta.CmplxSubZ = meta.Cmplx.FindMethod("sub", Static).Instances[0]
+		meta.CmplxMulZ = meta.Cmplx.FindMethod("mul", Static).Instances[0]
+		meta.CmplxDivZ = meta.Cmplx.FindMethod("div", Static).Instances[0]
+
+		ret meta
+	}
 }
\ No newline at end of file
diff --git a/src/julec/opt/flag.jule b/src/julec/opt/flag.jule
index eafa63bc4..56c5cd82b 100644
--- a/src/julec/opt/flag.jule
+++ b/src/julec/opt/flag.jule
@@ -14,7 +14,7 @@ enum OptLevel {
 
 	// Passed flags:
 	//  All flags of the L0, L1 and additionally:
-	//  StdStrings
+	//  StdStrings, StdMathCmplx
 	L2,
 }
 
@@ -35,6 +35,7 @@ static mut Dynamic = false
 static mut Array = false
 static mut Len = false
 static mut StdStrings = false
+static mut StdMathCmplx = false
 
 // Pushes optimization flags related with optimization level.
 fn PushOptLevel(level: OptLevel) {
@@ -59,4 +60,5 @@ fn PushOptLevel(level: OptLevel) {
 	Len = l1
 
 	StdStrings = l2
+	StdMathCmplx = l2
 }
\ No newline at end of file
diff --git a/src/julec/opt/optimizer.jule b/src/julec/opt/optimizer.jule
index e8b5af4b6..ded1411f3 100644
--- a/src/julec/opt/optimizer.jule
+++ b/src/julec/opt/optimizer.jule
@@ -119,5 +119,5 @@ fn detectEnabled() {
 	exprEnabled = StdStrings || Ptr || Math || Access || Cond || Array || Str ||
 		Dynamic || Len
 	scopeEnabled = Cond || Append || Copy || Str || Slice || Assign || Exceptional ||
-		Iter || Dynamic
+		Iter || Dynamic || StdMathCmplx
 }
\ No newline at end of file
diff --git a/src/julec/opt/scope.jule b/src/julec/opt/scope.jule
index cb34f0069..347fb87aa 100644
--- a/src/julec/opt/scope.jule
+++ b/src/julec/opt/scope.jule
@@ -409,6 +409,48 @@ impl scopeOptimizer {
 		exprOptimizer.optimizeData(postfix.Expr, self.data)
 	}
 
+	fn cmplxAssign(mut &self, mut &assign: &sema::Assign): bool {
+		if !StdMathCmplx || assign.Op.Id != token::Id.Eq || obj::ProgramMeta.MathCmplx == nil {
+			ret false
+		}
+		mut s := assign.Left.Type.Struct()
+		if s == nil || s != obj::ProgramMeta.MathCmplx.Cmplx {
+			ret false
+		}
+		match type assign.Right.Model {
+		| &sema::FnCallExprModel:
+			break
+		|:
+			ret false
+		}
+		mut fc := (&sema::FnCallExprModel)(assign.Right.Model)
+		match type fc.Expr {
+		| &sema::StructSubIdentExprModel:
+			break
+		|:
+			ret false
+		}
+		mut siem := (&sema::StructSubIdentExprModel)(fc.Expr)
+		if !equalModels(assign.Left.Model, siem.Expr.Model) {
+			ret false
+		}
+		match fc.Func {
+		| obj::ProgramMeta.MathCmplx.CmplxAdd:
+			fc.Func = obj::ProgramMeta.MathCmplx.CmplxAddZ
+		| obj::ProgramMeta.MathCmplx.CmplxSub:
+			fc.Func = obj::ProgramMeta.MathCmplx.CmplxSubZ
+		| obj::ProgramMeta.MathCmplx.CmplxMul:
+			fc.Func = obj::ProgramMeta.MathCmplx.CmplxMulZ
+		| obj::ProgramMeta.MathCmplx.CmplxDiv:
+			fc.Func = obj::ProgramMeta.MathCmplx.CmplxDivZ
+		|:
+			ret false
+		}
+		siem.Method = fc.Func
+		self.setCurrentStmt(&sema::Data{Model: fc})
+		ret true
+	}
+
 	fn optimizeAssign(mut &self, mut assign: &sema::Assign) {
 		if assign.Op.Id == token::Id.Eq &&
 			equalModels(assign.Left.Model, assign.Right.Model) {
@@ -446,7 +488,8 @@ impl scopeOptimizer {
 
 		match {
 		| self.strAssign(assign)
-		| self.sliceAssign(assign):
+		| self.sliceAssign(assign)
+		| self.cmplxAssign(assign):
 			ret
 		}