diff --git a/debian/rules b/debian/rules
index c68153ae3..80e1dc01a 100755
--- a/debian/rules
+++ b/debian/rules
@@ -14,7 +14,7 @@ $(BUILDDIR)/Makefile:
 	mkdir -p $(BUILDDIR)
 	cd $(BUILDDIR) && \
 	cmake .. \
-		-DENABLE_DOC=ON \
+		-DENABLE_DOC:BOOL=ON \
 		-DCMAKE_INSTALL_PREFIX:FILEPATH=/usr \
 		-DCMAKE_BUILD_TYPE:STRING=RelWithDebInfo \
 		-DCMAKE_C_FLAGS_RELWITHDEBINFO:STRING="$(CFLAGS) -D_FORTIFY_SOURCE=2" \