diff --git a/src/algorithms/libs/rtklib/rtklib_ionex.cc b/src/algorithms/libs/rtklib/rtklib_ionex.cc
index 72f1528ff..94d641c13 100644
--- a/src/algorithms/libs/rtklib/rtklib_ionex.cc
+++ b/src/algorithms/libs/rtklib/rtklib_ionex.cc
@@ -463,7 +463,7 @@ void readtec(const char *file, nav_t *nav, int opt)
         }
     for (i = 0; i < MAXEXFILE; i++)
         {
-            if (!(efiles[i] = static_cast<char *>(malloc(1024))))
+            if (!(efiles[i] = static_cast<char *>(malloc(MAXSTRPATH + 255))))
                 {
                     for (i--; i >= 0; i--)
                         {
diff --git a/src/algorithms/libs/rtklib/rtklib_preceph.cc b/src/algorithms/libs/rtklib/rtklib_preceph.cc
index 0b80640b7..bd26944b1 100644
--- a/src/algorithms/libs/rtklib/rtklib_preceph.cc
+++ b/src/algorithms/libs/rtklib/rtklib_preceph.cc
@@ -420,7 +420,7 @@ void readsp3(const char *file, nav_t *nav, int opt)
 
     for (i = 0; i < MAXEXFILE; i++)
         {
-            if (!(efiles[i] = static_cast<char *>(malloc(1024))))
+            if (!(efiles[i] = static_cast<char *>(malloc(MAXSTRPATH + 255))))
                 {
                     for (i--; i >= 0; i--)
                         {
@@ -601,7 +601,7 @@ int readdcb(const char *file, nav_t *nav, const sta_t *sta)
         }
     for (i = 0; i < MAXEXFILE; i++)
         {
-            if (!(efiles[i] = static_cast<char *>(malloc(1024))))
+            if (!(efiles[i] = static_cast<char *>(malloc(MAXSTRPATH + 255))))
                 {
                     for (i--; i >= 0; i--)
                         {
diff --git a/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc b/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc
index efec6edeb..29b9d024e 100644
--- a/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc
+++ b/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc
@@ -5278,7 +5278,7 @@ int expath(const char *path, char *paths[], int nmax)
                 }
             if (p && n < nmax)
                 {
-                    std::snprintf(paths[n++], MAXSTRPATH, "%s%s", dir, d->d_name);
+                    std::snprintf(paths[n++], MAXSTRPATH + 255, "%s%s", dir, d->d_name);
                 }
         }
     closedir(dp);
diff --git a/src/algorithms/libs/rtklib/rtklib_sbas.cc b/src/algorithms/libs/rtklib/rtklib_sbas.cc
index 3c239161e..7379a8fa5 100644
--- a/src/algorithms/libs/rtklib/rtklib_sbas.cc
+++ b/src/algorithms/libs/rtklib/rtklib_sbas.cc
@@ -782,7 +782,7 @@ int sbsreadmsgt(const char *file, int sel, gtime_t ts, gtime_t te,
 
     for (i = 0; i < MAXEXFILE; i++)
         {
-            if (!(efiles[i] = static_cast<char *>(malloc(1024))))
+            if (!(efiles[i] = static_cast<char *>(malloc(MAXSTRPATH + 255))))
                 {
                     for (i--; i >= 0; i--)
                         {