diff --git a/endless-sky.spec b/endless-sky.spec
index fc4f19e..f55655c 100644
--- a/endless-sky.spec
+++ b/endless-sky.spec
@@ -53,7 +53,7 @@ Images, sound, and game data for %{name}.
 
 
 %build
-CXXFLAGS="${CXXFLAGS:-%__global_cxxflags}"	\
+CCFLAGS="${CCFLAGS:-%__global_cflags}"	\
 LDFLAGS="${LDFLAGS:-%__global_ldflags}"	\
 %{_bindir}/scons		\
 	%{?_smp_mflags}		\
@@ -66,7 +66,7 @@ desktop-file-validate %{name}.desktop
 
 
 %install
-CXXFLAGS="${CXXFLAGS:-%__global_cxxflags}"	\
+CCFLAGS="${CCFLAGS:-%__global_cflags}"	\
 LDFLAGS="${LDFLAGS:-%__global_ldflags}"	\
 %{_bindir}/scons		\
 	%{?_smp_mflags}		\