diff --git a/root.spec b/root.spec
index 62599909a6b..af5a5d24a65 100644
--- a/root.spec
+++ b/root.spec
@@ -43,8 +43,8 @@ export CXXFLAGS=-D__ROOFIT_NOBANNER
 
 cmake ../%{n}-%{realversion} \
   -G Ninja \
-  -DCMAKE_BUILD_TYPE=Release \
-  -DLLVM_BUILD_TYPE=Release \
+  -DCMAKE_BUILD_TYPE=Debug \
+  -DLLVM_BUILD_TYPE=Debug \
   -DCMAKE_INSTALL_PREFIX="%{i}" \
   -DCMAKE_C_COMPILER=gcc \
   -DCMAKE_CXX_COMPILER=g++ \