diff --git a/libnczarr/zdebug.c b/libnczarr/zdebug.c
index f003e4b705..acbeaf9537 100644
--- a/libnczarr/zdebug.c
+++ b/libnczarr/zdebug.c
@@ -415,7 +415,6 @@ zdumpcommon(const struct Common* c)
 /**************************************************/
 /* Filter/Plugin debug */
 
-#if defined(ZDEBUGF) || defined(ZTRACING)
 const char*
 printfilter(const NCZ_Filter* f)
 {
@@ -545,4 +544,3 @@ debugf_unused(void)
 (void)printhdf5class;
 (void)printcodecclass;
 }
-#endif /*ZDEBUGF*/
diff --git a/libnczarr/zdebug.h b/libnczarr/zdebug.h
index 290240ba0a..2c568e2807 100644
--- a/libnczarr/zdebug.h
+++ b/libnczarr/zdebug.h
@@ -79,7 +79,6 @@ struct ZUTEST {
 };
 EXTERNL struct ZUTEST* zutest;
 
-#ifdef ZDEBUGF
 struct NCZ_Filter;
 struct NCZ_Plugin;
 struct NCZ_Codec;
@@ -98,6 +97,5 @@ const char* printhdf5class(const struct H5Z_class2_t* hdf5);
 const char* printcodecclass(const struct NCZ_codec_t* codec);
 const char* printcodecapi(const struct CodecAPI* ca);
 const char* printloadedplugins(void);
-#endif /*ZDEBUGF*/
 
 #endif /*ZDEBUG_H*/