diff --git a/cmd/raidz_test/Makefile.am b/cmd/raidz_test/Makefile.am
index ccfa7019cb..72c914e641 100644
--- a/cmd/raidz_test/Makefile.am
+++ b/cmd/raidz_test/Makefile.am
@@ -4,7 +4,7 @@ include $(top_srcdir)/config/Rules.am
 AM_CFLAGS += $(FRAME_LARGER_THAN)
 
 # Unconditionally enable ASSERTs
-AM_CPPFLAGS += -DDEBUG -UNDEBUG
+AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
 
 bin_PROGRAMS = raidz_test
 
diff --git a/cmd/zdb/Makefile.am b/cmd/zdb/Makefile.am
index 7a29e54f69..b325cb060b 100644
--- a/cmd/zdb/Makefile.am
+++ b/cmd/zdb/Makefile.am
@@ -1,7 +1,7 @@
 include $(top_srcdir)/config/Rules.am
 
 # Unconditionally enable debugging for zdb
-AM_CPPFLAGS += -DDEBUG -UNDEBUG
+AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
 
 sbin_PROGRAMS = zdb
 
diff --git a/cmd/zhack/Makefile.am b/cmd/zhack/Makefile.am
index 6c5b5d096c..5cddac32b5 100644
--- a/cmd/zhack/Makefile.am
+++ b/cmd/zhack/Makefile.am
@@ -1,5 +1,8 @@
 include $(top_srcdir)/config/Rules.am
 
+# Unconditionally enable debugging for zhack
+AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
+
 sbin_PROGRAMS = zhack
 
 zhack_SOURCES = \
diff --git a/cmd/ztest/Makefile.am b/cmd/ztest/Makefile.am
index 40d029d9f3..6042b44d1d 100644
--- a/cmd/ztest/Makefile.am
+++ b/cmd/ztest/Makefile.am
@@ -7,7 +7,7 @@ AM_CFLAGS += $(NO_FORMAT_TRUNCATION)
 AM_CFLAGS += $(FRAME_LARGER_THAN)
 
 # Unconditionally enable ASSERTs
-AM_CPPFLAGS += -DDEBUG -UNDEBUG
+AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
 
 sbin_PROGRAMS = ztest
 
diff --git a/lib/libzpool/Makefile.am b/lib/libzpool/Makefile.am
index 6256d5e739..7924a425d2 100644
--- a/lib/libzpool/Makefile.am
+++ b/lib/libzpool/Makefile.am
@@ -7,6 +7,9 @@ VPATH = \
 	$(top_srcdir)/module/os/linux/zfs \
 	$(top_srcdir)/lib/libzpool
 
+# Unconditionally enable debugging for libzpool
+AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
+
 # Suppress unused but set variable warnings often due to ASSERTs
 AM_CFLAGS += $(NO_UNUSED_BUT_SET_VARIABLE)
 
diff --git a/tests/zfs-tests/cmd/btree_test/Makefile.am b/tests/zfs-tests/cmd/btree_test/Makefile.am
index 0bb8f99173..4c9a1a4cc2 100644
--- a/tests/zfs-tests/cmd/btree_test/Makefile.am
+++ b/tests/zfs-tests/cmd/btree_test/Makefile.am
@@ -22,7 +22,7 @@ DEFAULT_INCLUDES += \
 	-I$(top_srcdir)/lib/libspl/include
 
 # Unconditionally enable ASSERTs
-AM_CPPFLAGS += -DDEBUG -UNDEBUG
+AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
 
 pkgexec_PROGRAMS = btree_test
 btree_test_SOURCES = btree_test.c