diff --git a/faiss/CMakeLists.txt b/faiss/CMakeLists.txt
index a890a46f11..33e1849568 100644
--- a/faiss/CMakeLists.txt
+++ b/faiss/CMakeLists.txt
@@ -290,7 +290,10 @@ if(WIN32)
   target_compile_definitions(faiss_avx512 PRIVATE FAISS_MAIN_LIB)
 endif()
 
-target_compile_definitions(faiss PRIVATE FINTEGER=int)
+string(FIND "${CMAKE_CXX_FLAGS}" "FINTEGER" finteger_idx)
+if (${finteger_idx} EQUAL -1)
+  target_compile_definitions(faiss PRIVATE FINTEGER=int)
+endif()
 target_compile_definitions(faiss_avx2 PRIVATE FINTEGER=int)
 target_compile_definitions(faiss_avx512 PRIVATE FINTEGER=int)
 
diff --git a/faiss/impl/LocalSearchQuantizer.cpp b/faiss/impl/LocalSearchQuantizer.cpp
index 8da989a9a4..943fe32c9d 100644
--- a/faiss/impl/LocalSearchQuantizer.cpp
+++ b/faiss/impl/LocalSearchQuantizer.cpp
@@ -104,10 +104,10 @@ int dgemm_(
 
 namespace {
 
-void fmat_inverse(float* a, int n) {
-    int info;
-    int lwork = n * n;
-    std::vector<int> ipiv(n);
+void fmat_inverse(float* a, FINTEGER n) {
+    FINTEGER info;
+    FINTEGER lwork = n * n;
+    std::vector<FINTEGER> ipiv(n);
     std::vector<float> workspace(lwork);
 
     sgetrf_(&n, &n, a, &n, ipiv.data(), &info);
@@ -123,10 +123,10 @@ void dfvec_add(size_t d, const double* a, const float* b, double* c) {
     }
 }
 
-void dmat_inverse(double* a, int n) {
-    int info;
-    int lwork = n * n;
-    std::vector<int> ipiv(n);
+void dmat_inverse(double* a, FINTEGER n) {
+    FINTEGER info;
+    FINTEGER lwork = n * n;
+    std::vector<FINTEGER> ipiv(n);
     std::vector<double> workspace(lwork);
 
     dgetrf_(&n, &n, a, &n, ipiv.data(), &info);