diff --git a/src/GrammarApplicator.cpp b/src/GrammarApplicator.cpp
index 3455245e..83947691 100644
--- a/src/GrammarApplicator.cpp
+++ b/src/GrammarApplicator.cpp
@@ -439,7 +439,7 @@ void GrammarApplicator::printReading(const Reading* reading, std::ostream& outpu
 		}
 	}
 
-	if (reading->parent->type & CT_RELATED) {
+	if (print_ids || reading->parent->type & CT_RELATED) {
 		u_fprintf(output, " ID:%u", reading->parent->global_number);
 		if (!reading->parent->relations.empty()) {
 			for (const auto& miter : reading->parent->relations) {
diff --git a/src/GrammarApplicator.hpp b/src/GrammarApplicator.hpp
index 87741afd..7937238e 100644
--- a/src/GrammarApplicator.hpp
+++ b/src/GrammarApplicator.hpp
@@ -123,6 +123,7 @@ class GrammarApplicator {
 	bool split_mappings = false;
 	bool pipe_deleted = false;
 	bool add_spacing = true;
+	bool print_ids = false;
 
 	bool dep_has_spanned = false;
 	uint32_t dep_delimit = 0;
diff --git a/src/main.cpp b/src/main.cpp
index 28c2b735..c894dd46 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -531,6 +531,9 @@ void GAppSetOpts(GrammarApplicator& applicator, UConverter* conv) {
 		}
 		std::cerr << "Debug level set to " << applicator.debug_level << std::endl;
 	}
+	if (options[PRINT_IDS].doesOccur) {
+		applicator.print_ids = true;
+	}
 	if (options[NUM_WINDOWS].doesOccur) {
 		applicator.num_windows = std::stoul(options[NUM_WINDOWS].value);
 	}
diff --git a/src/options.hpp b/src/options.hpp
index 85615454..a03fc7c8 100644
--- a/src/options.hpp
+++ b/src/options.hpp
@@ -69,6 +69,7 @@ enum OPTIONS {
 	MAPPING_PREFIX,
 	UNICODE_TAGS,
 	UNIQUE_TAGS,
+	PRINT_IDS,
 	NUM_WINDOWS,
 	ALWAYS_SPAN,
 	SOFT_LIMIT,
@@ -143,6 +144,7 @@ std::array<UOption,NUM_OPTIONS> options{
 	UOption{"prefix",              'p', UOPT_REQUIRES_ARG, "sets the mapping prefix; defaults to @"},
 	UOption{"unicode-tags",          0, UOPT_NO_ARG,       "outputs Unicode code points for things like ->"},
 	UOption{"unique-tags",           0, UOPT_NO_ARG,       "outputs unique tags only once per reading"},
+	UOption{"print-ids",             0, UOPT_NO_ARG,       "always output IDs"},
 
 	UOption{"num-windows",           0, UOPT_REQUIRES_ARG, "number of windows to keep in before/ahead buffers; defaults to 2"},
 	UOption{"always-span",           0, UOPT_NO_ARG,       "forces scanning tests to always span across window boundaries"},