diff --git a/src/hardware/hw_md2.c b/src/hardware/hw_md2.c
index 38b151d91..4c60936b2 100644
--- a/src/hardware/hw_md2.c
+++ b/src/hardware/hw_md2.c
@@ -144,13 +144,13 @@ static inline void md2_printModelInfo (model_t *model)
 #ifdef HAVE_PNG
 static void PNG_error(png_structp PNG, png_const_charp pngtext)
 {
-	CONS_Debug(DBG_RENDER, "libpng error at %p: %s", PNG, pngtext);
+	CONS_Debug(DBG_RENDER, "libpng error at %p: %s", (void*)PNG, pngtext);
 	//I_Error("libpng error at %p: %s", PNG, pngtext);
 }
 
 static void PNG_warn(png_structp PNG, png_const_charp pngtext)
 {
-	CONS_Debug(DBG_RENDER, "libpng warning at %p: %s", PNG, pngtext);
+	CONS_Debug(DBG_RENDER, "libpng warning at %p: %s", (void*)PNG, pngtext);
 }
 
 static GLTextureFormat_t PNG_Load(const char *filename, int *w, int *h, GLPatch_t *grpatch)
diff --git a/src/m_misc.c b/src/m_misc.c
index f4649a3ad..ccd4522a0 100644
--- a/src/m_misc.c
+++ b/src/m_misc.c
@@ -746,12 +746,12 @@ static const char *Newsnapshotfile(const char *pathname, const char *ext)
 FUNCNORETURN static void PNG_error(png_structp PNG, png_const_charp pngtext)
 {
 	//CONS_Debug(DBG_RENDER, "libpng error at %p: %s", PNG, pngtext);
-	I_Error("libpng error at %p: %s", PNG, pngtext);
+	I_Error("libpng error at %p: %s", (void*)PNG, pngtext);
 }
 
 static void PNG_warn(png_structp PNG, png_const_charp pngtext)
 {
-	CONS_Debug(DBG_RENDER, "libpng warning at %p: %s", PNG, pngtext);
+	CONS_Debug(DBG_RENDER, "libpng warning at %p: %s", (void*)PNG, pngtext);
 }
 
 static void M_PNGhdr(png_structp png_ptr, png_infop png_info_ptr, PNG_CONST png_uint_32 width, PNG_CONST png_uint_32 height, PNG_CONST png_byte *palette)
diff --git a/src/p_enemy.c b/src/p_enemy.c
index 04e77bd8f..13aa583f1 100644
--- a/src/p_enemy.c
+++ b/src/p_enemy.c
@@ -8240,7 +8240,7 @@ void A_RemoteAction(mobj_t *actor)
 		astate = &states[locvar2];
 
 		CONS_Debug(DBG_GAMELOGIC, "A_RemoteAction: Calling action on %p\n"
-				"var1 is %d\nvar2 is %d\n", actor->target, var1, var2);
+				"var1 is %d\nvar2 is %d\n", (void*)actor->target, var1, var2);
 		states[locvar2].action.acp1(actor->target);
 	}
 
diff --git a/src/r_picformats.c b/src/r_picformats.c
index d0cd5ba93..9f9028fc2 100644
--- a/src/r_picformats.c
+++ b/src/r_picformats.c
@@ -873,13 +873,13 @@ static int PNG_ChunkReader(png_structp png_ptr, png_unknown_chunkp chonk)
 
 static void PNG_error(png_structp PNG, png_const_charp pngtext)
 {
-	CONS_Debug(DBG_RENDER, "libpng error at %p: %s", PNG, pngtext);
+	CONS_Debug(DBG_RENDER, "libpng error at %p: %s", (void*)PNG, pngtext);
 	//I_Error("libpng error at %p: %s", PNG, pngtext);
 }
 
 static void PNG_warn(png_structp PNG, png_const_charp pngtext)
 {
-	CONS_Debug(DBG_RENDER, "libpng warning at %p: %s", PNG, pngtext);
+	CONS_Debug(DBG_RENDER, "libpng warning at %p: %s", (void*)PNG, pngtext);
 }
 
 static png_byte grAb_chunk[5] = {'g', 'r', 'A', 'b', (png_byte)'\0'};