diff --git a/mlpack.spec b/mlpack.spec
index 8c8d6b7..17b5a41 100644
--- a/mlpack.spec
+++ b/mlpack.spec
@@ -141,7 +141,7 @@ cp %SOURCE2 stb/;
 
 # Try and reduce RAM usage.
 %ifarch armv7hl
-cmake -D CMAKE_C_FLAGS="`echo %{optflags} | sed 's/-pipe//g' | sed 's/$/ --param ggc-min-heapsize=32768 --param ggc-min-expand=1/'`" -D CMAKE_CXX_FLAGS="`echo %{optflags} | sed 's/-pipe//g' | sed 's/$/ --param ggc-min-heapsize=32768 --param ggc-min-expand=1/'`" .
+cmake -D CMAKE_C_FLAGS="`echo %{optflags} | sed 's/-pipe//g' | sed 's/$/ --param ggc-min-heapsize=32768 --param ggc-min-expand=1/'`" -D CMAKE_CXX_FLAGS="`echo %{optflags} | sed 's/-pipe//g' | sed 's/$/ --param ggc-min-heapsize=8192 --param ggc-min-expand=0/'`" .
 %endif
 
 # Don't use %make because it could use too much RAM with multiple cores on Koji...