diff --git a/Devmapper.cpp b/Devmapper.cpp
index e56a4da..4b6942d 100644
--- a/Devmapper.cpp
+++ b/Devmapper.cpp
@@ -195,7 +195,7 @@
 
     char *geoParams = buffer + sizeof(struct dm_ioctl);
     // bps=512 spc=8 res=32 nft=2 sec=8190 mid=0xf0 spt=63 hds=64 hid=0 bspf=8 rdcl=2 infs=1 bkbs=2
-    strcpy(geoParams, "0 64 63 0");
+    strlcpy(geoParams, "0 64 63 0", DEVMAPPER_BUFFER_SIZE - sizeof(struct dm_ioctl));
     geoParams += strlen(geoParams) + 1;
     geoParams = (char *) _align(geoParams, 8);
     if (ioctl(fd, DM_DEV_SET_GEOMETRY, io)) {