diff --git a/src/cmem.c b/src/cmem.c
index 20d8e41..a931ba9 100644
--- a/src/cmem.c
+++ b/src/cmem.c
@@ -56,7 +56,7 @@ void *cosmoM_reallocate(CState *state, void *buf, size_t oldSize, size_t newSize
 #endif
 
     if (newBuf == NULL) {
-        CERROR("failed to allocate memory!");
+        printf("[ERROR] failed to allocate memory!");
         exit(1);
     }
 
diff --git a/src/cosmo.h b/src/cosmo.h
index b482c2d..0aca5e1 100644
--- a/src/cosmo.h
+++ b/src/cosmo.h
@@ -64,6 +64,4 @@ typedef int (*cosmo_Writer)(CState *state, const void *data, size_t size, const
 #define UNNAMEDCHUNK    "_main"
 #define COSMOASSERT(x)  assert(x)
 
-#define CERROR(err)     printf("%s : %s\n", "[ERROR]", err)
-
 #endif
diff --git a/src/cstate.c b/src/cstate.c
index 3ed618f..f416715 100644
--- a/src/cstate.c
+++ b/src/cstate.c
@@ -32,7 +32,7 @@ CState *cosmoV_newState()
     CState *state = malloc(sizeof(CState));
 
     if (state == NULL) {
-        CERROR("failed to allocate memory!");
+        printf("[ERROR] failed to allocate memory!");
         exit(1);
     }
 
diff --git a/src/cvm.c b/src/cvm.c
index 89d085e..5e98a19 100644
--- a/src/cvm.c
+++ b/src/cvm.c
@@ -696,7 +696,7 @@ static inline uint16_t READUINT(CCallFrame *frame)
 #    define SWITCH switch (READBYTE(frame))
 #    define DEFAULT                                                                                \
     default:                                                                                       \
-        CERROR("unknown opcode!");                                                                 \
+        printf("[ERROR] unknown opcode!");                                                                 \
         exit(0)
 #endif