diff --git a/CXSparse/Config/cs.h.in b/CXSparse/Config/cs.h.in
index e73488a3d..6280e7467 100644
--- a/CXSparse/Config/cs.h.in
+++ b/CXSparse/Config/cs.h.in
@@ -27,12 +27,12 @@
 #define _CXS_H
 
 #if @CXSPARSE_USE_COMPLEX@
-#include <complex.h>
-#define cs_complex_t double _Complex
-#endif
-
-#ifdef __cplusplus
-extern "C" {
+#  ifdef __cplusplus
+#    include <complex>
+#  else
+#    include <complex.h>
+#  endif
+#  define cs_complex_t double _Complex
 #endif
 
 #define CS_VER @CXSPARSE_VERSION_MAJOR@  /* CXSparse Version */
@@ -47,6 +47,10 @@ extern "C" {
 #define cs_long_t_id    "%" PRId64
 #define cs_long_t_max   INT64_MAX
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* -------------------------------------------------------------------------- */
 /* double/int32_t version of CXSparse */
 /* -------------------------------------------------------------------------- */
diff --git a/CXSparse/Include/cs.h b/CXSparse/Include/cs.h
index 5a083f82c..e1cf17f04 100644
--- a/CXSparse/Include/cs.h
+++ b/CXSparse/Include/cs.h
@@ -27,12 +27,12 @@
 #define _CXS_H
 
 #if 1
-#include <complex.h>
-#define cs_complex_t double _Complex
-#endif
-
-#ifdef __cplusplus
-extern "C" {
+#  ifdef __cplusplus
+#    include <complex>
+#  else
+#    include <complex.h>
+#  endif
+#  define cs_complex_t double _Complex
 #endif
 
 #define CS_VER 4  /* CXSparse Version */
@@ -47,6 +47,10 @@ extern "C" {
 #define cs_long_t_id    "%" PRId64
 #define cs_long_t_max   INT64_MAX
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* -------------------------------------------------------------------------- */
 /* double/int32_t version of CXSparse */
 /* -------------------------------------------------------------------------- */