diff --git a/Src/Base/AMReX_GpuComplex.H b/Src/Base/AMReX_GpuComplex.H
index 4cf0d6e69c8..205788375f4 100644
--- a/Src/Base/AMReX_GpuComplex.H
+++ b/Src/Base/AMReX_GpuComplex.H
@@ -2,6 +2,7 @@
 #define AMREX_GPUCOMPLEX_H_
 #include <AMReX_Config.H>
 
+#include <AMReX_Algorithm.H>
 #include <AMReX_Math.H>
 #include <cmath>
 #include <iostream>