diff --git a/src/spicelib/devices/hicum2/hicumL2.cpp b/src/spicelib/devices/hicum2/hicumL2.cpp
index d7acc9fb2..fbeb1554d 100644
--- a/src/spicelib/devices/hicum2/hicumL2.cpp
+++ b/src/spicelib/devices/hicum2/hicumL2.cpp
@@ -14,9 +14,6 @@ Model Author         : 1990 Michael Schröter TU Dresden
  */
 
 #include <cmath>
-#ifndef M_PI
-#define M_PI 3.1415926535897932384626433832795
-#endif
 #include "duals/dual"
 #include "hicumL2.hpp"
 #include "hicumL2temp.hpp"
diff --git a/src/spicelib/devices/hicum2/hicumL2temp.cpp b/src/spicelib/devices/hicum2/hicumL2temp.cpp
index 205f87ae5..416f28938 100644
--- a/src/spicelib/devices/hicum2/hicumL2temp.cpp
+++ b/src/spicelib/devices/hicum2/hicumL2temp.cpp
@@ -5,9 +5,6 @@ Model Author         : 1990 Michael Schröter TU Dresden
 **********/
 
 #include <cmath>
-#ifndef M_PI
-#define M_PI 3.1415926535897932384626433832795
-#endif
 #include "duals/dual"
 #include "hicumL2.hpp"
 #include <functional>