diff --git a/mtxclient.spec b/mtxclient.spec
index e5d1001..b8f3b0c 100644
--- a/mtxclient.spec
+++ b/mtxclient.spec
@@ -1,7 +1,7 @@
 %bcond_without clang
 
 %if %{with clang}
-%global optflags %(echo %{optflags} | sed -e 's/-mcet//g' -e 's/-fcf-protection//g' -e 's/-fstack-clash-protection//g' -e 's/$/-Qunused-arguments -Wno-unknown-warning-option -Wno-deprecated-declarations/')
+%global optflags %(echo %{optflags} | sed -e 's/-mcet//g' -e 's/-fcf-protection//g' -e 's/-fstack-clash-protection//g' -e 's/$/ -Qunused-arguments -Wno-unknown-warning-option -Wno-deprecated-declarations/')
 %endif
 
 Name: mtxclient