diff --git a/libr/core/gdiff.c b/libr/core/gdiff.c
index 063cb9e7e17b1..d7651e5048cbe 100644
--- a/libr/core/gdiff.c
+++ b/libr/core/gdiff.c
@@ -2,8 +2,7 @@
 
 #include <r_core.h>
 
-// R2_600 -return bool instead of int
-R_API int r_core_gdiff_fcn(RCore *c, ut64 addr, ut64 addr2) {
+R_API bool r_core_gdiff_fcn(RCore *c, ut64 addr, ut64 addr2) {
 	R_RETURN_VAL_IF_FAIL (c, false);
 	RAnalFunction *fa = r_anal_get_function_at (c->anal, addr);
 	RAnalFunction *fb = r_anal_get_function_at (c->anal, addr2);
diff --git a/libr/include/r_core.h b/libr/include/r_core.h
index e77434910c086..73eb072b12f68 100644
--- a/libr/include/r_core.h
+++ b/libr/include/r_core.h
@@ -808,7 +808,7 @@ R_API int r_core_pseudo_code(RCore *core, const char *input);
 /* gdiff.c */
 R_API bool r_core_zdiff(RCore *c, RCore *c2);
 R_API bool r_core_gdiff(RCore *core1, RCore *core2);
-R_API int r_core_gdiff_fcn(RCore *c, ut64 addr, ut64 addr2);
+R_API bool r_core_gdiff_fcn(RCore *c, ut64 addr, ut64 addr2);
 
 /* project */
 R_API void r_core_project_execute_cmds(RCore *core, const char *prjfile);