diff --git a/debian/changelog b/debian/changelog
index 76514b61..cfac21b2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+llvm-toolchain-13 (1:13.0.1-9) UNRELEASED; urgency=medium
+
+  * d/rules: Don't send an empty string to cmake when llvm-spirv is not found
+
+ -- Jordan Justen <jljusten@debian.org>  Fri, 28 Oct 2022 10:17:57 -0700
+
 llvm-toolchain-13 (1:13.0.1-8) unstable; urgency=medium
 
   [ Sylvestre Ledru ]
diff --git a/debian/rules b/debian/rules
index 891ce6b9..698482c0 100755
--- a/debian/rules
+++ b/debian/rules
@@ -234,10 +234,10 @@ else
 endif
 
 LIBCLC_TARGETS_TO_BUILD="amdgcn--;amdgcn--amdhsa;amdgcn-mesa-mesa3d;r600--;nvptx--;nvptx64--;nvptx--nvidiacl;nvptx64--nvidiacl"
-LIBCLC_TARGETS_LLVM_SPIRV := ""
+LIBCLC_TARGETS_LLVM_SPIRV =
 ifeq ($(LLVM_SPIRV_INSTALLED),yes)
 	LIBCLC_TARGETS_TO_BUILD := $(LIBCLC_TARGETS_TO_BUILD)";spirv-mesa3d-;spirv64-mesa3d-"
-	LIBCLC_TARGETS_LLVM_SPIRV := "-DLLVM_SPIRV=$(LLVM_SPIRV)"
+	LIBCLC_TARGETS_LLVM_SPIRV = "-DLLVM_SPIRV=$(LLVM_SPIRV)"
 endif
 
 BINUTILS_GOLD_ARCHS := amd64 arm64 armhf i386 ppc64 ppc64el x32 s390x hurd-i386 kfreebsd-amd64 kfreebsd-i386