diff --git a/src/debug.c b/src/debug.c
index ac886fc8d75a03ac67b213e0639cd384f0980529..17048a16d0f6415eb66e6427a11611a5bef6c649 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -40,9 +40,7 @@
 #include "space.h"
 
 /* Import the right hydro definition */
-#if defined(DEBUG_INTERACTIONS_SPH)
-#include "./hydro/DebugInteractions/hydro_debug.h"
-#elif defined(MINIMAL_SPH)
+#if defined(MINIMAL_SPH)
 #include "./hydro/Minimal/hydro_debug.h"
 #elif defined(GADGET2_SPH)
 #include "./hydro/Gadget2/hydro_debug.h"
diff --git a/src/hydro.h b/src/hydro.h
index cbe26761e2470bea73028d1e2ed12204ac730d0e..abb49d35b204bbaf986f502d796883e7eb778e7f 100644
--- a/src/hydro.h
+++ b/src/hydro.h
@@ -27,11 +27,7 @@
 #include "kernel_hydro.h"
 
 /* Import the right functions */
-#if defined(DEBUG_INTERACTIONS_SPH)
-#include "./hydro/DebugInteractions/hydro.h"
-#include "./hydro/DebugInteractions/hydro_iact.h"
-#define SPH_IMPLEMENTATION "Debug SELF/PAIR"
-#elif defined(MINIMAL_SPH)
+#if defined(MINIMAL_SPH)
 #include "./hydro/Minimal/hydro.h"
 #include "./hydro/Minimal/hydro_iact.h"
 #define SPH_IMPLEMENTATION "Minimal version of SPH (e.g. Price 2010)"
diff --git a/src/hydro_io.h b/src/hydro_io.h
index 29044de30960d1e80590d63609063c9552c79308..639c2f3ae640d7b74e6a2507bd4e3d5ad5625171 100644
--- a/src/hydro_io.h
+++ b/src/hydro_io.h
@@ -23,9 +23,7 @@
 #include "../config.h"
 
 /* Import the right functions */
-#if defined(DEBUG_INTERACTIONS_SPH)
-#include "./hydro/DebugInteractions/hydro_io.h"
-#elif defined(MINIMAL_SPH)
+#if defined(MINIMAL_SPH)
 #include "./hydro/Minimal/hydro_io.h"
 #elif defined(GADGET2_SPH)
 #include "./hydro/Gadget2/hydro_io.h"
diff --git a/src/part.h b/src/part.h
index ebe0ae41c6a292e5ec140dcaf32c4620c7f8586f..1b40aee0db3deb4790e07e3da9807060900d0c55 100644
--- a/src/part.h
+++ b/src/part.h
@@ -42,10 +42,7 @@
 #define gpart_align 128
 
 /* Import the right hydro particle definition */
-#if defined(DEBUG_INTERACTIONS_SPH)
-#include "./hydro/DebugInteractions/hydro_part.h"
-#define hydro_need_extra_init_loop 0
-#elif defined(MINIMAL_SPH)
+#if defined(MINIMAL_SPH)
 #include "./hydro/Minimal/hydro_part.h"
 #define hydro_need_extra_init_loop 0
 #elif defined(GADGET2_SPH)