diff --git a/Eigen/src/SuperLUSupport/SuperLUSupport.h b/Eigen/src/SuperLUSupport/SuperLUSupport.h
index 0c101494a..b5d29b219 100644
--- a/Eigen/src/SuperLUSupport/SuperLUSupport.h
+++ b/Eigen/src/SuperLUSupport/SuperLUSupport.h
@@ -65,6 +65,24 @@ DECL_GSSVX(z, double, std::complex<double>)
 #ifdef EIGEN_SUPERLU_HAS_ILU
 
 // similarly for the incomplete factorization using gsisx
+#if defined(SUPERLU_MAJOR_VERSION) && (SUPERLU_MAJOR_VERSION >= 5)
+#define DECL_GSISX(PREFIX, FLOATTYPE, KEYTYPE)                                                                         \
+  extern "C" {                                                                                                         \
+  extern void PREFIX##gsisx(superlu_options_t *, SuperMatrix *, int *, int *, int *, char *, FLOATTYPE *, FLOATTYPE *, \
+                            SuperMatrix *, SuperMatrix *, void *, int, SuperMatrix *, SuperMatrix *, FLOATTYPE *,      \
+                            FLOATTYPE *, GlobalLU_t *, mem_usage_t *, SuperLUStat_t *, int *);                         \
+  }                                                                                                                    \
+  inline float SuperLU_gsisx(superlu_options_t *options, SuperMatrix *A, int *perm_c, int *perm_r, int *etree,         \
+                             char *equed, FLOATTYPE *R, FLOATTYPE *C, SuperMatrix *L, SuperMatrix *U, void *work,      \
+                             int lwork, SuperMatrix *B, SuperMatrix *X, FLOATTYPE *recip_pivot_growth,                 \
+                             FLOATTYPE *rcond, SuperLUStat_t *stats, int *info, KEYTYPE) {                             \
+    mem_usage_t mem_usage;                                                                                             \
+    GlobalLU_t gLU;                                                                                                    \
+    PREFIX##gsisx(options, A, perm_c, perm_r, etree, equed, R, C, L, U, work, lwork, B, X, recip_pivot_growth, rcond,  \
+                  &gLU, &mem_usage, stats, info);                                                                      \
+    return mem_usage.for_lu; /* bytes used by the factor storage */                                                    \
+  }
+#else  // version < 5.0
 #define DECL_GSISX(PREFIX, FLOATTYPE, KEYTYPE)                                                                         \
   extern "C" {                                                                                                         \
   extern void PREFIX##gsisx(superlu_options_t *, SuperMatrix *, int *, int *, int *, char *, FLOATTYPE *, FLOATTYPE *, \
@@ -80,6 +98,7 @@ DECL_GSSVX(z, double, std::complex<double>)
                   &mem_usage, stats, info);                                                                            \
     return mem_usage.for_lu; /* bytes used by the factor storage */                                                    \
   }
+#endif
 
 DECL_GSISX(s, float, float)
 DECL_GSISX(c, float, std::complex<float>)