diff --git a/include/sirit/sirit.h b/include/sirit/sirit.h
index bdd42c6..34f9b93 100644
--- a/include/sirit/sirit.h
+++ b/include/sirit/sirit.h
@@ -793,6 +793,9 @@ public:
     /// Result is the reciprocal of sqrt x. Result is undefined if x <= 0.
     Id OpInverseSqrt(Id result_type, Id x);
 
+    /// Result is a floating-point number from x and the corresponding integral exponent of two in exp.
+    Id OpLdexp(Id result_type, Id x, Id exp);
+
     /// Result is y if y < x; otherwise result is x. Which operand is the result is undefined if one
     /// of the operands is a NaN.
     Id OpFMin(Id result_type, Id x, Id y);
diff --git a/src/instructions/extension.cpp b/src/instructions/extension.cpp
index bd61caa..44dc691 100644
--- a/src/instructions/extension.cpp
+++ b/src/instructions/extension.cpp
@@ -54,6 +54,7 @@ DEFINE_UNARY(OpExp2, GLSLstd450Exp2)
 DEFINE_UNARY(OpLog2, GLSLstd450Log2)
 DEFINE_UNARY(OpSqrt, GLSLstd450Sqrt)
 DEFINE_UNARY(OpInverseSqrt, GLSLstd450InverseSqrt)
+DEFINE_BINARY(OpLdexp, GLSLstd450Ldexp)
 DEFINE_BINARY(OpFMin, GLSLstd450FMin)
 DEFINE_BINARY(OpUMin, GLSLstd450UMin)
 DEFINE_BINARY(OpSMin, GLSLstd450SMin)