diff --git a/ggml-opencl.cpp b/ggml-opencl.cpp
index fc7bf520d..d08b39a2c 100644
--- a/ggml-opencl.cpp
+++ b/ggml-opencl.cpp
@@ -14,7 +14,7 @@
 
 #include "ggml.h"
 
-#define CL_DMMV_BLOCK_SIZE 64;
+#define CL_DMMV_BLOCK_SIZE 32;
 
 #define MULTILINE_QUOTE(...) #__VA_ARGS__
 static std::string program_source = MULTILINE_QUOTE(
diff --git a/otherarch/ggml_v2-opencl.cpp b/otherarch/ggml_v2-opencl.cpp
index 6193662ba..93f038ef5 100644
--- a/otherarch/ggml_v2-opencl.cpp
+++ b/otherarch/ggml_v2-opencl.cpp
@@ -14,7 +14,7 @@
 
 #include "ggml_v2.h"
 
-#define CL_DMMV_BLOCK_SIZE 64;
+#define CL_DMMV_BLOCK_SIZE 32;
 
 #define MULTILINE_QUOTE(...) #__VA_ARGS__
 static std::string program_source = MULTILINE_QUOTE(