diff --git a/arch/risc-v/src/esp32c3/esp32c3_rtcheap.c b/arch/risc-v/src/esp32c3/esp32c3_rtcheap.c
index 92461ac988b..7db37cd6cb1 100644
--- a/arch/risc-v/src/esp32c3/esp32c3_rtcheap.c
+++ b/arch/risc-v/src/esp32c3/esp32c3_rtcheap.c
@@ -177,7 +177,7 @@ bool esp32c3_rtcheap_heapmember(void *mem)
  *
  ****************************************************************************/
 
-int esp32c3_rtcheap_mallinfo(struct mallinfo *info)
+struct mallinfo esp32c3_rtcheap_mallinfo(void)
 {
-  return mm_mallinfo(g_rtcheap, info);
+  return mm_mallinfo(g_rtcheap);
 }
diff --git a/arch/risc-v/src/esp32c3/esp32c3_rtcheap.h b/arch/risc-v/src/esp32c3/esp32c3_rtcheap.h
index 565c5291386..88ab9b68725 100644
--- a/arch/risc-v/src/esp32c3/esp32c3_rtcheap.h
+++ b/arch/risc-v/src/esp32c3/esp32c3_rtcheap.h
@@ -136,7 +136,7 @@ bool esp32c3_rtcheap_heapmember(void *mem);
  *
  ****************************************************************************/
 
-int esp32c3_rtcheap_mallinfo(struct mallinfo *info);
+struct mallinfo esp32c3_rtcheap_mallinfo(void);
 
 #undef EXTERN
 #ifdef __cplusplus
diff --git a/arch/xtensa/src/esp32/esp32_imm.c b/arch/xtensa/src/esp32/esp32_imm.c
index 5a879d50fde..92159002167 100644
--- a/arch/xtensa/src/esp32/esp32_imm.c
+++ b/arch/xtensa/src/esp32/esp32_imm.c
@@ -176,7 +176,7 @@ bool xtensa_imm_heapmember(void *mem)
  *
  ****************************************************************************/
 
-struct mallinfo xtensa_imm_mallinfo()
+struct mallinfo xtensa_imm_mallinfo(void)
 {
   return mm_mallinfo(g_iheap);
 }
diff --git a/arch/xtensa/src/esp32s3/esp32s3_rtcheap.c b/arch/xtensa/src/esp32s3/esp32s3_rtcheap.c
index 247735d1956..1fe5293a5fa 100644
--- a/arch/xtensa/src/esp32s3/esp32s3_rtcheap.c
+++ b/arch/xtensa/src/esp32s3/esp32s3_rtcheap.c
@@ -188,7 +188,7 @@ bool esp32s3_rtcheap_heapmember(void *mem)
  *
  ****************************************************************************/
 
-int esp32s3_rtcheap_mallinfo(struct mallinfo *info)
+struct mallinfo esp32s3_rtcheap_mallinfo(void)
 {
-  return mm_mallinfo(g_rtcheap, info);
+  return mm_mallinfo(g_rtcheap);
 }
diff --git a/arch/xtensa/src/esp32s3/esp32s3_rtcheap.h b/arch/xtensa/src/esp32s3/esp32s3_rtcheap.h
index dfbe5c092fb..9909f812bab 100644
--- a/arch/xtensa/src/esp32s3/esp32s3_rtcheap.h
+++ b/arch/xtensa/src/esp32s3/esp32s3_rtcheap.h
@@ -139,7 +139,7 @@ bool esp32s3_rtcheap_heapmember(void *mem);
  *
  ****************************************************************************/
 
-int esp32s3_rtcheap_mallinfo(struct mallinfo *info);
+struct mallinfo esp32s3_rtcheap_mallinfo(void);
 
 #undef EXTERN
 #ifdef __cplusplus