diff --git a/SPECS/sc-im.spec b/SPECS/sc-im.spec
index e76cd5c..a83f4cd 100644
--- a/SPECS/sc-im.spec
+++ b/SPECS/sc-im.spec
@@ -38,6 +38,7 @@ SC-IM is a spreadsheet program that is based on SC.
 
 
 %build
+sed 's|-DMAXROWS=65536|-DMAXROWS=1048576|' -i Makefile
 export CFLAGS="%{optflags} -DXLSX -DXLSX_EXPORT"
 export LDLIBS="-lxlsreader -lxlsxwriter"
 make %{?_smp_mflags} -C src