diff --git a/ggml-quants.c b/ggml-quants.c
index ec695cf98..32f42bbcd 100644
--- a/ggml-quants.c
+++ b/ggml-quants.c
@@ -11928,9 +11928,9 @@ size_t quantize_iq1_m(const float * restrict src, void * restrict dst, int nrow,
     for (int row = 0; row < nrow; ++row) {
         quantize_row_iq1_impl(GGML_TYPE_IQ1_M, src, qrow, n_per_row, quant_weights, scales, weight, sumx, sumw, pairs, L, index, shifts);
         src += n_per_row;
-        qrow += nblock*sizeof(block_iq1_s);
+        qrow += nblock*sizeof(block_iq1_m);
     }
-    return nrow * nblock * sizeof(block_iq1_s);
+    return nrow * nblock * sizeof(block_iq1_m);
 }
 
 // ============================ 4-bit non-linear quants
diff --git a/ggml.c b/ggml.c
index 715f38ddf..be8691349 100644
--- a/ggml.c
+++ b/ggml.c
@@ -783,6 +783,18 @@ static const ggml_type_traits_t type_traits[GGML_TYPE_COUNT] = {
         .nrows                    = 1,
     },
     [GGML_TYPE_IQ1_S] = {
+        .type_name                = "iq1_s",
+        .blck_size                = QK_K,
+        .type_size                = sizeof(block_iq1_s),
+        .is_quantized             = true,
+        .to_float                 = (ggml_to_float_t) dequantize_row_iq1_s,
+        .from_float               = NULL,
+        .from_float_reference     = NULL,
+        .vec_dot                  = ggml_vec_dot_iq1_s_q8_K,
+        .vec_dot_type             = GGML_TYPE_Q8_K,
+        .nrows                    = 1,
+    },
+    [GGML_TYPE_IQ1_M] = {
         .type_name                = "iq1_m",
         .blck_size                = QK_K,
         .type_size                = sizeof(block_iq1_m),
@@ -794,18 +806,6 @@ static const ggml_type_traits_t type_traits[GGML_TYPE_COUNT] = {
         .vec_dot_type             = GGML_TYPE_Q8_K,
         .nrows                    = 1,
     },
-    [GGML_TYPE_IQ1_M] = {
-        .type_name                = "iq1_m",
-        .blck_size                = QK_K,
-        .type_size                = sizeof(block_iq1_s),
-        .is_quantized             = true,
-        .to_float                 = (ggml_to_float_t) dequantize_row_iq1_s,
-        .from_float               = NULL,
-        .from_float_reference     = NULL,
-        .vec_dot                  = ggml_vec_dot_iq1_s_q8_K,
-        .vec_dot_type             = GGML_TYPE_Q8_K,
-        .nrows                    = 1,
-    },
     [GGML_TYPE_IQ4_NL] = {
         .type_name                = "iq4_nl",
         .blck_size                = QK4_NL,