diff --git a/meson.build b/meson.build
index c746776208d..5dc25d03dc7 100644
--- a/meson.build
+++ b/meson.build
@@ -782,12 +782,15 @@ substs.set('DEBUGTTY', get_option('debug-tty'))
 
 enable_debug_hashmap = false
 enable_debug_mmap_cache = false
+enable_debug_siphash = false
 enable_debug_udev = false
 foreach name : get_option('debug-extra')
         if name == 'hashmap'
                 enable_debug_hashmap = true
         elif name == 'mmap-cache'
                 enable_debug_mmap_cache = true
+        elif name == 'siphash'
+                enable_debug_siphash = true
         elif name == 'udev'
                 enable_debug_udev = true
         else
@@ -796,6 +799,7 @@ foreach name : get_option('debug-extra')
 endforeach
 conf.set10('ENABLE_DEBUG_HASHMAP', enable_debug_hashmap)
 conf.set10('ENABLE_DEBUG_MMAP_CACHE', enable_debug_mmap_cache)
+conf.set10('ENABLE_DEBUG_SIPHASH', enable_debug_siphash)
 conf.set10('ENABLE_DEBUG_UDEV', enable_debug_udev)
 
 conf.set10('VALGRIND', get_option('valgrind'))
@@ -3132,6 +3136,7 @@ foreach tuple : [
         ['gshadow'],
         ['debug hashmap'],
         ['debug mmap cache'],
+        ['debug siphash'],
         ['debug udev'],
         ['valgrind',         conf.get('VALGRIND') == 1],
         ['trace logging',    conf.get('LOG_TRACE') == 1],
diff --git a/meson_options.txt b/meson_options.txt
index 0e99682014a..62167ae92d6 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -45,7 +45,7 @@ option('debug-shell', type : 'string', value : '/bin/sh',
        description : 'path to debug shell binary')
 option('debug-tty', type : 'string', value : '/dev/tty9',
        description : 'specify the tty device for debug shell')
-option('debug-extra', type : 'array', choices : ['hashmap', 'mmap-cache', 'udev'], value : [],
+option('debug-extra', type : 'array', choices : ['hashmap', 'mmap-cache', 'siphash', 'udev'], value : [],
        description : 'enable extra debugging')
 option('memory-accounting-default', type : 'boolean',
        description : 'enable MemoryAccounting= by default')
diff --git a/src/basic/siphash24.c b/src/basic/siphash24.c
index d3a81b7cc16..30c228a78ae 100644
--- a/src/basic/siphash24.c
+++ b/src/basic/siphash24.c
@@ -90,7 +90,7 @@ void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
                         /* We did not have enough input to fill out the padding completely */
                         return;
 
-#ifdef DEBUG
+#if ENABLE_DEBUG_SIPHASH
                 printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
                 printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
                 printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
@@ -110,7 +110,7 @@ void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
 
         for ( ; in < end; in += 8) {
                 m = unaligned_read_le64(in);
-#ifdef DEBUG
+#if ENABLE_DEBUG_SIPHASH
                 printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
                 printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
                 printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
@@ -158,7 +158,7 @@ uint64_t siphash24_finalize(struct siphash *state) {
 
         b = state->padding | (((uint64_t) state->inlen) << 56);
 
-#ifdef DEBUG
+#if ENABLE_DEBUG_SIPHASH
         printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
         printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
         printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);
@@ -171,7 +171,7 @@ uint64_t siphash24_finalize(struct siphash *state) {
         sipround(state);
         state->v0 ^= b;
 
-#ifdef DEBUG
+#if ENABLE_DEBUG_SIPHASH
         printf("(%3zu) v0 %08x %08x\n", state->inlen, (uint32_t) (state->v0 >> 32), (uint32_t) state->v0);
         printf("(%3zu) v1 %08x %08x\n", state->inlen, (uint32_t) (state->v1 >> 32), (uint32_t) state->v1);
         printf("(%3zu) v2 %08x %08x\n", state->inlen, (uint32_t) (state->v2 >> 32), (uint32_t) state->v2);